Objective Biology for NEET

Problem 2

Mendel was the native of
(a) France
(b) Sweden
(c) India
(d) Austria

Qudsiya Anis

Numerade Educator

Problem 3

Mendel proposed which of the following terms for hereditary units?
(a) Factor (determiner)
(b) Genome
(c) Genetic particle
(d) None of these

Qudsiya Anis

Numerade Educator

01:30

Problem 4

In genetics, the use of chequer board was done by
(a) Mendel
(b) Correns
(c) Punnet
(d) Darwin

Qudsiya Anis

Numerade Educator

In 1900 CE, three biologists independently discovered Mendel's principles. They are
(a) De Vries, Correns and Tschermak
(b) Sutton, Morgan and Bridges
(c) Avery, MacLeod and McCarty
(d) Bateson, Punnet and Bridges

Qudsiya Anis

Numerade Educator

02:21

Problem 6

Which of the following has been used for genetic researches?
(a) Pisum
(b) Neurospora
(c) E. coli
(d) All of these

Qudsiya Anis

Numerade Educator

02:57

Problem 7

Organism of pure line is that which produces individuals of
(a) Dominant characters
(b) Recessive characters
(c) Its own characters
(d) Intermediate type

Qudsiya Anis

Numerade Educator

02:34

Problem 8

Mendel is famous for his work on
(a) Pisum
(b) Drosophila
(c) Neurospora
(d) Oenothera

Qudsiya Anis

Numerade Educator

02:00

Problem 9

The main reason for the success of Mendel was
(a) Study of all the characters at the same time
(b) Study of one character at one time
(c) Study of all the plants at the same time
(d) Counting of plants

Qudsiya Anis

Numerade Educator

01:45

Problem 10

The alleles are
(a) A pair of genes governing a specific character such as tallness or dwarfness.
(b) Multiple forms of genes.
(c) Genes governing eye characters.
(d) Genes present in allosomes.

Qudsiya Anis

Numerade Educator

02:10

Problem 11

An allele is said to be dominant if
(a) It is expressed only in heterozygous combination.
(b) It is expressed only in homozygous combination.
(c) It is expressed in both homozygous and heterozygous condition.
(d) It is expressed only in second generation.

Qudsiya Anis

Numerade Educator

02:18

Problem 12

What is the correct sequence of the following events?
1. Formation of the chromosome theory of heredity.
2. Experiments which proved that DNA is the hereditary material.
3. Mendel's laws of inheritance-discovery.
(a) 1,3 and 2
(b) 1,2 and 3
(c) 3,1 and 2
(d) 2,1 and 3

Qudsiya Anis

Numerade Educator

01:58

Problem 13

When a true breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds, then all the $\mathrm{F}_{1}$ plants have yellow seeds. This means that the allele for yellow is
(a) Heterozygous
(b) Dominant
(c) Recessive
(d) Lethal

Qudsiya Anis

Numerade Educator

01:38

Problem 14

An organism's genetic constitution is called its
(a) Genotype
(b) Phenotype
(c) Holotype
(d) None of these

Qudsiya Anis

Numerade Educator

01:30

Problem 15

An organism with two identical alleles for a given trait is
(a) Homozygous
(b) Segregating
(c) Dominant
(d) A hermaphrodite

Qudsiya Anis

Numerade Educator

01:27

Problem 16

What type of gametes will be formed by genotype RrYy?
(a) RY, Ry, rY, ry
(b) RY, Ry, ry, ry
(c) $\mathrm{Ry}, \mathrm{Ry}, \mathrm{Yy}, \mathrm{ry}$
(d) Rr, RR, Yy, YY

Qudsiya Anis

Numerade Educator

02:27

Problem 17

Which genotype characterizes an organism that is heterozygous for two genes?
(a) RRYy
(b) RrYY
(c) RRYY
(d) $\mathrm{RrYy}$

Qudsiya Anis

Numerade Educator

01:55

Problem 18

The dwarfness in plants of $\mathrm{F}_{2}$ generation is
(a) Recessive
(b) Dominant
(c) Both (a) and (b)
(d) None of these

Qudsiya Anis

Numerade Educator

02:36

Problem 19

When heterozygous tall plants are self-pollinated, then tall and dwarf plants are obtained. This explains
(a) Law of purity of gamete
(b) Segregation of law
(c) Division in spores
(d) Independent assortment

Qudsiya Anis

Numerade Educator

02:44

Problem 20

Mendel's principle of segregation was based on the separation of alleles in the garden pea during
(a) Pollination
(b) Embryonic development
(c) Seed formation
(d) Gamete formation

Qudsiya Anis

Numerade Educator

02:40

Problem 21

Which of the following is the dominant character according to Mendel?
(a) Dwarf plant and yellow fruit
(b) Terminal fruit and wrinkled seed
(c) White testa and yellow pericarp
(d) Green coloured pod and rounded seed

Qudsiya Anis

Numerade Educator

02:11

Problem 22

In Mendelism, the linkage was not observed due to
(a) Mutation
(b) Independent assortment
(c) Synapsis
(d) Crossing over

Qudsiya Anis

Numerade Educator

Problem 23

Mendel's law of heredity can be explained with the help of
(a) Mitosis
(b) Meiosis
(c) Both mitosis and meiosis
(d) None of these

Qudsiya Anis

Numerade Educator

02:32

Problem 24

A cross between plants having RRYY and rryy composition will yield plants with
(a) Round and yellow seeds
(b) Round and green seeds
(c) Wrinkled and yellow seeds
(d) Wrinkled and green seeds

Qudsiya Anis

Numerade Educator

Problem 25

The genotype of an individual is Rr Bb. How many different types of gametes will it produce based on the law of independent assortment?
(a) 16
(b) 9
(c) 8
(d) 4

Qudsiya Anis

Numerade Educator

01:55

Problem 26

Which of the following is heterozygous for two pairs of alleles?
(a) TTRR
(b) TrR
(c) ttrr
(d) TrtR

Qudsiya Anis

Numerade Educator

02:39

Problem 27

In Mendel's experiment, nature of seed coat, flower colour, position of flower, pod colour, stem height, etc., are referred to as
(a) Allcles
(b) Genotypes
(c) Phenotypes
(d) All of thesc

Qudsiya Anis

Numerade Educator

03:20

Problem 28

A cross between a homozygous recessive and a heterozygous plant is called
(a) Monohybrid cross
(b) Dihybrid cross
(c) Test cross
(d) Back cross

Qudsiya Anis

Numerade Educator

03:09

Problem 29

Cross between $\mathrm{F}_{1}$ plant and recessive female plant is called
(a) Back cross
(b) Test cross
(c) Out cross
(d) Mutation

Qudsiya Anis

Numerade Educator

03:45

Problem 30

In $\mathrm{F}_{2}$ generation, a phenotypic ratio of $1: 1: 1: 1$ exhibits
(a) Back cross
(b) Monohybrid test cross
(c) Lethality
(d) Dihybrid test cross

Qudsiya Anis

Numerade Educator

04:43

Problem 31

Which of the following depicts the Mendel's dihybrid ratio?
(a) $3: 1$
(b) $9: 3: 3: 1$
(c) $9: 7$
(d) $15: 1$

Qudsiya Anis

Numerade Educator

05:58

Problem 32

In dihybrid cross, out of 16 plants obtained, the number of genotypes will be
(a) 4
(b) 9
(c) 16
(d) 12

Qudsiya Anis

Numerade Educator

04:18

Problem 33

Pure homozygous offsprings in a dihybrid cross in the $\mathrm{F}_{2}$ generation will be
(a) $\frac{1}{2}$
(b) $\frac{1}{4}$
(c) $\frac{1}{8}$
(d) $\frac{1}{16}$

Qudsiya Anis

Numerade Educator

01:11

Problem 34

In hybridization, $\mathrm{Tt} \times \mathrm{tt}$ gives rise to the progeny of ratio
(a) $1: 1$
(b) $1: 2$
(c) $2: 1$
(d) $1: 2: 1$

Paras Aggarwal

Numerade Educator

Problem 35

Self-pollination between $\mathrm{Tt}$ and $\mathrm{Tt}$ plants results into the genotype ratio of
(a) $3: 1$
(b) $1: 2: 1$
(c) $1: 3$
(d) $4: 0$

Qudsiya Anis

Numerade Educator

02:47

Problem 36

Mendel crossed a pure white-flowered recessive pea plant with a dominant pure red-flowered plant. The first generation of hybrids from the cross should show
(a) 50 per cent white-flowered and 50 per cent red-flowered plants
(b) All red-flowered plants
(c) 75 per cent red-flowered and 25 per cent white-flowered plants
(d) All white-flowered plants

Qudsiya Anis

Numerade Educator

02:26

Problem 37

If in a dihybrid cross, Mendel had used two such characters which have linked, he would have faced difficulty in explaining the results on the basis of his
(a) Law of segregation
(b) Law of multiple factor hypothesis
(c) Law of independent assortment
(d) Law of dominance

Qudsiya Anis

Numerade Educator

Problem 38

From a cross $\mathrm{Aa} \mathrm{BB} \times \mathrm{aa} \mathrm{BB}$, which of the following genotypic ratio will be obtained in $\mathrm{F}_{1}$ generation?
(a) $1 \mathrm{Aa} \mathrm{BB}: 1 \mathrm{aa} \mathrm{BB}$
(b) $1 \mathrm{Aa} \mathrm{BB}: 3 \mathrm{aa} \mathrm{BB}$

Qudsiya Anis

Numerade Educator

03:18

Problem 39

A farmer crossed a walnut combed chicken with a single combed one and obtained all walnut combed chickens in Fl. The genotype of the parents was
(a) $\operatorname{Rr} \mathrm{Pp} \times \mathrm{rr} \mathrm{pp}$
(b) $R R P P \times r r p p$
(c) $\mathrm{RR} \mathrm{pp} \times \mathrm{rr} \mathrm{pp}$
(d) $R R P p \times r r p p$

Qudsiya Anis

Numerade Educator

02:57

Problem 40

In sweet peas, genes $\mathrm{C}$ and $\mathrm{P}$ are necessary for colour in flowers. The flowers are white in the absence of either or both the genes. What will be the percentage of coloured flowers in the offspring of the cross Cc pp $\times \operatorname{cc}$ Pp?
(a) $100 \%$
(b) $75 \%$
(c) $25 \%$
(d) $50 \%$

Qudsiya Anis

Numerade Educator

02:27

Problem 41

In a monohybrid cross, 120 plants are obtained. The ratio of homozygous and heterozygous will be
(a) $40: 80$
(b) $60: 60$
(c) $20: 100$
(d) $10: 110$

Qudsiya Anis

Numerade Educator

02:52

Problem 42

If Mendel had studied the seven traits using a plant with 12 chromosomes instead of 14 , in what way would his interpretation have been different?
(a) He could have mapped the chromosome.
(b) He would have discovered blending or incomplete dominance.
(c) He would not have discovered the law of independent assortment.
(d) He would have discovered sex linkage.

Qudsiya Anis

Numerade Educator

01:20

Problem 43

How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AABbCc?
(a) 2
(b) 4
(c) 6
(d) 9

Qudsiya Anis

Numerade Educator

02:18

Problem 44

Mendel's law of independent assortment is applicable for
(a) All genes in all organisms
(b) All genes of pea plant only
(c) All linked genes only
(d) All non-linked genes only

Qudsiya Anis

Numerade Educator

02:55

Problem 45

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness ( $\mathrm{T}$ ) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, then
(a) 75 per cent will be tall with red fruit
(b) All the offspring will be tall with red fruit
(c) 25 per cent will be tall with red fruit
(d) 50 per cent will be tall with red fruit

Qudsiya Anis

Numerade Educator

Problem 46

When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), then the generation consists of tall plants with rounded seeds. How many types of gametes a plant would produce?
(a) One
(b) Three
(c) Four
(d) Eight

Qudsiya Anis

Numerade Educator

Problem 47

Mendel did his experiment on
(a) Garden pea (Pisum sativum)
(b) Snapdragon
(c) Drosophila
(d) Lathyrus odoratus

Qudsiya Anis

Numerade Educator

02:40

Problem 48

How many contrasting traits are chosen by Mendel?
(a) 7
(b) 14
(c) 21
(d) 4

Qudsiya Anis

Numerade Educator

Problem 49

Mendel conducted an experiment on garden pea for how many years?
(a) 7
(b) 10
(c) 4
(d) 15

Qudsiya Anis

Numerade Educator

Problem 50

Select the incorrect matching. Characters Dominant trait $\quad$ Recessive trait
(a) Seed shape
Wrinkled
(b) Seed colour
<smiles>C1CCCCCC1</smiles> Green
(c) Flower colour
Violet White
(d) Pod shape
Constricted Full

Qudsiya Anis

Numerade Educator

Problem 51

Number of character of garden pea flower chosen by Mendel?
(a) 1
(b) 2
(c) 3
(d) 4

Qudsiya Anis

Numerade Educator

03:06

Problem 52

Select the false statement from the following:
(a) Mendel for the first time applied statistical analysis and mathematical logics to problems in biology.
(b) Mendel's experiment had a large sampling size, which gave greater credibility to the data that he collected.
(c) Mendel conducted artificial cross-pollination experiment using true-breeding pea lines.
(d) Mendel selected 14 true-breeding pea plant varieties, as pairs which were similar except for two characters with contrasting traits.

Qudsiya Anis

Numerade Educator

04:19

Problem 53

In Mendelian dihybrid cross, how many individuals are homozygous dominant for both the genes in $\mathrm{F}_{2}$ generation?
(a) $\frac{1}{16}$
(b) $\frac{2}{16}$
(c) $\frac{4}{16}$
(d) $\frac{6}{16}$

Qudsiya Anis

Numerade Educator

03:17

Problem 54

In Mendelian dihybrid cross, how many individuals are homozygous recessive for one of the character only in $\mathrm{F}_{2}$ generation?
(a) $\frac{1}{16}$
(b) $\frac{2}{16}$
(c) $\frac{3}{16}$
(d) $\frac{6}{16}$

Qudsiya Anis

Numerade Educator

Problem 55

In Mendelian dihybrid cross, how many individuals are heterozygous of both the character in $\mathrm{F}_{2}$ -generation?
(a) $\frac{1}{16}$
(b) $\frac{2}{16}$
(c) $\frac{3}{16}$
(d) $\frac{4}{16}$

Qudsiya Anis

Numerade Educator

01:09

Problem 56

In Mendelian dihybrid cross, how many of progeny in $\mathrm{F}_{2}$ generation possess genotype rryy?
(a) $\frac{1}{16}$
(b) $\frac{2}{16}$
(c) $\frac{3}{16}$
(d) $\frac{4}{16}$

Qudsiya Anis

Numerade Educator

02:51

Problem 57

How many genotypes are formed in Mendelian dihybrid cross?
(a) 4
(b) 9
(c) 6
(d) 8

Qudsiya Anis

Numerade Educator

Problem 58

The below diagram shows:
(a) Monohybrid cross
(b) Dihydrid cross
(c) Trihydrid cross
(d) All the above

Qudsiya Anis

Numerade Educator

Problem 59

The below diagram represents
(a) Back cross
(b) Out cross
(c) Test cross
(d) Dihybrid cross

Qudsiya Anis

Numerade Educator

02:00

Problem 60

The below diagram represents
(a) Dominant epistasis
(b) Recessive epistasis
(c) Incomplete dominance
(d) Co-dominance

Qudsiya Anis

Numerade Educator

02:04

Problem 61

Identify $\mathrm{A}$ to $\mathrm{E}$ in this figure.
(a) A: Petal; B: Stigma; C: Anther; D: Stamen; E: Carpel
(b) A: Anther; B: Petal; C: Stigma; D: Carpel; E: Stamen
(c) A: Carpel; B: Stamen; C: Anther; D: Stigma; E: Petal
(d) A: Stigma; B: Petal; C: Stamen; D: Anther; E: Carpel

Qudsiya Anis

Numerade Educator

Problem 62

Identify A, B, C and D in this figure?
(a) A: Female parent; B: Removal of anthers (Emasculation); C: Transfer of pollen (Pollination); D: Male parent
(b) A: Male parent; B: Female parent; C: Removal of anthers (Emasculation); D: Transfer of pollen (Pollination)
(c) A: Removal of anthers (Emasculation); B: Female parent; C: Transfer of pollen (Pollination); D: Male parent
(d) A: Female parent; B: Male parent; C: Transfer of pollen (Pollination); D: Removal of anthers (Emasculation)

Qudsiya Anis

Numerade Educator

02:25

Problem 63

Inheritance of ABO blood group system is an example of
(a) Multiple allelism
(b) Partial dominance
(c) Epistasis
(d) Dominance

Qudsiya Anis

Numerade Educator

01:54

Problem 64

Genotype of blood group 'A' will be
(a) $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\wedge}$
(b) $I^{B} I^{B}$
(c) $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}}$ or $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\circ}$
(d) $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\circ}$

Qudsiya Anis

Numerade Educator

01:47

Problem 65

Blood group 'B' will have alleles
(a) ii
(b) $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}}$
(c) $\mathrm{I}^{\mathrm{B}} \mathrm{I}^{\mathrm{B}}$
(d) $\mathrm{I}^{\wedge} \mathrm{I}^{\mathrm{B}}$

Qudsiya Anis

Numerade Educator

02:14

Problem 66

If one parent belongs to 'A' blood group and the other to 'O' blood group, their children possibly represent
(a) A and B groups only
(b) AB only
(c) A and O groups only
(d) All four groups

Qudsiya Anis

Numerade Educator

Problem 67

If a child has $O$ type of blood group and the father has B type, then the genotype of the father will be
(a) I II
(b) $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{B}}$
(c) $\mathrm{I}^{\mathrm{O}} \mathrm{I}^{\mathrm{B}}$
(d) $I^{B} I^{B}$

Qudsiya Anis

Numerade Educator

01:32

Problem 68

A person with antigens 'B' in RBC and antibodies 'A' in the plasma belongs to the blood group
(a) $\mathrm{A}$
(b) $\mathrm{B}$
(c) $\mathrm{AB}$
(d) $\mathrm{O}$

Qudsiya Anis

Numerade Educator

02:14

Problem 69

Rh factor may be responsible for
(a) Turner's syndrome
(b) AIDS
(c) Sickle-cell anaemia
(d) Erythroblastosis fetalis

Qudsiya Anis

Numerade Educator

Problem 70

A human female with blood group 'A' has
(a) Antibody-anti-B in the red blood cells and antigen $\mathrm{A}$ in the serum
(b) Antigen A in the red blood cells and antibody-anti-B in the serum
(c) Antigen $\mathrm{B}$ in the red blood cells and antibody-anti-B in the serum
(d) Antigen A in the red blood cells and antibody-anti-A in the serum

Qudsiya Anis

Numerade Educator

Problem 71

Rh factor is named after
(a) Man
(b) Rat
(c) Monkey
(d) Chimpanzee

Qudsiya Anis

Numerade Educator

03:05

Problem 72

If one parent has blood group A and the other parent has blood group B, the offspring have which blood group?
(a) $\mathrm{AB}$
(b) $\mathrm{O}$
(c) $\mathrm{BO}$
(d) $\mathrm{A}, \mathrm{B}, \mathrm{AB}, \mathrm{O}$

Qudsiya Anis

Numerade Educator

02:04

Problem 73

Mendel did not recognize the linkage phenomenon in his experiments because
(a) There were many chromosomes to handle.
(b) Characters he studied were located on different chromosomes.
(c) He did not have powerful microscope.
(d) He studied only pure plants.

Qudsiya Anis

Numerade Educator

Problem 74

Exchange of genetic material between chromatids of homologous chromosomes during meiosis is called
(a) Synapsis
(b) Chiasmata
(c) Transformation
(d) Crossing over

Qudsiya Anis

Numerade Educator

Problem 75

In maize, the chromosome number is $2 \mathrm{n}=20$. The number of linkage groups in it will be
(a) 20
(b) 40
(c) 10
(d) 5

Qudsiya Anis

Numerade Educator

Problem 76

The map distance between genes $\mathrm{A}$ and $\mathrm{B}$ is 3 units, between $\mathrm{B}$ and $\mathrm{C}$ is 10 units and between $\mathrm{C}$ and $\mathrm{A}$ is 7 units. The order of the genes in a linkage map constructed on the above data would perhaps be
(a) A, B, C
(b) $\mathrm{A}, \mathrm{C}, \mathrm{B}$
(c) B, C, A
(d) B, A, C

Qudsiya Anis

Numerade Educator

02:25

Problem 77

Crossing over in diploid organism is responsible for
(a) Dominance of genes
(b) Linkage between genes
(c) Segregation of alleles
(d) Recombination of linked allele

Qudsiya Anis

Numerade Educator

Problem 78

The percentage of crossing over will be more if
(a) Linked genes are located far apart from each other
(b) Linked genes are located close to cach other
(c) Gencs are not linked
(d) Genes are located in a different cell

Qudsiya Anis

Numerade Educator

01:29

Problem 79

Linkage was first observed in
(a) Ficld pea
(b) Swect pea
(c) $\mathrm{Pca}$
(d) Grass pea

Qudsiya Anis

Numerade Educator

Problem 80

Drosophila has four pairs of chromosomes. How many linkage groups does it have?
(a) Eight
(b) Four
(c) One less than the pairs of chromosomes
(d) One more than the pairs of chromosomes

Qudsiya Anis

Numerade Educator

Problem 81

Linkage in Drosophila was first discovered by
(a) Morgan
(b) Bateson and Punnett
(c) Sturtevant
(d) Bridges

Qudsiya Anis

Numerade Educator

Problem 82

Number of linkage groups in Pisum sativum is
(a) 2
(b) 5
(c) 7
(d) 9

Qudsiya Anis

Numerade Educator

Problem 83

Who coined the term linkage?
(a) Mendel
(b) Tschermak
(c) Sturtevant
(d) T. H. Morgan

Qudsiya Anis

Numerade Educator

02:34

Problem 84

In humans, the chromosomal condition of male is
(a) $44 \mathrm{AA}+\mathrm{XO}$
(b) $44 \mathrm{AA}+\mathrm{XX}$
(c) $44 \mathrm{AA}+\mathrm{XY}$
(d) $44 \mathrm{AA}+\mathrm{XXY}$

Qudsiya Anis

Numerade Educator

Problem 85

Physical association of two genes is known as
(a) Heterozygosis
(b) Linkage
(c) Recombination
(d) Homozygosis

Qudsiya Anis

Numerade Educator

05:02

Problem 86

Find out the incorrect statement.
(a) Morgan carried out several dihybrid crosses in drosophila to study the genes that were sex linked.
(b) Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes and mapped their position on chromosome.
(c) Henking gave the term X-body.
(d) Boveri united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritance.

Qudsiya Anis

Numerade Educator

02:03

Problem 87

Which cross shows very tight linkage?
(a) Cross A
(b) Cross B
(c) Both (a) and (b)
(d) None of these

Qudsiya Anis

Numerade Educator

02:16

Problem 88

Why drosophila melanogaster is suitable for the study of genetical variation?
(a) Could be grown on simple synthetic medium in laboratory.
(b) Complete life cycle is 2 weeks and single mating produces a large number of progeny flies.
(c) Clear sexual dimorphism is present and many types of heredity variation can be seen with low power microscope.
(d) All of these

Qudsiya Anis

Numerade Educator

02:07

Problem 89

Cytological observation made in a many number of led to the development of the concept of genetic/chromosomal basis of sex determination
(a) Mammals
(b) Birds
(c) Humans
(d) Insects

Qudsiya Anis

Numerade Educator

01:52

Problem 90

Who discovered X-body but could not explain its significance?
(a) Mendel
(b) Morgan
(c) Henking
(d) De vries

Qudsiya Anis

Numerade Educator

Problem 91

X-body of Henking was
(a) Nucleus
(b) Lipid
(c) Chromosome
(d) Ribosomes

Qudsiya Anis

Numerade Educator

01:47

Problem 92

X-chromosome is used in the determination of sex; therefore, it is known as
(a) Autosomes
(b) Sex chromosomes
(c) Microsomes
(d) Oxysomes

Qudsiya Anis

Numerade Educator

01:54

Problem 93

Which type of sex-determination is found in grasshopper?
(a) XO type
(b) XY typc
(c) ZW type
(d) Any of thesc

Qudsiya Anis

Numerade Educator

Problem 94

In the number of insects and mammals the type of sex determination is
(a) XO type
(b) XY type
(c) $Z \mathrm{~W}$ type
(d) Any of these

Qudsiya Anis

Numerade Educator

Problem 95

Male is homogametic in
(a) Drosophila
(b) Human
(c) Fowl
(d) All of these

Qudsiya Anis

Numerade Educator

01:31

Problem 96

How many chromosomes are present in human male?
(a) 22 Pairs + XX
(b) 22 Pairs + YY
(c) 22 Pairs + XY
(d) 21 Pairs $+X Y$

Qudsiya Anis

Numerade Educator

Problem 97

The below figure possess which of the following sex chromosomes?
(a) $\mathrm{XX}$
(b) $\mathrm{XY}$
(c) $\mathrm{ZZ}$
(d) $\mathrm{ZW}$

Qudsiya Anis

Numerade Educator

Problem 98

The below diagram shows
(a) $\mathrm{M}$ and $\mathrm{F}$ drosophila, respectively
(b) M and F housefly, respectively
(c) $\mathrm{F}$ and $\mathrm{M}$ drosophila, respectively
(d) $\mathrm{F}$ and $\mathrm{M}$ housefly, respectively

Qudsiya Anis

Numerade Educator

01:16

Problem 99

Which of the following is responsible for sex of the chicks?
(a) Sperm
(b) Egg
(c) Both (a) and (b)
(d) None of these

Qudsiya Anis

Numerade Educator

02:22

Problem 100

Find out the correct statement.
(a) Genctic makeup of the egg determines the sex of the child in human.
(b) Genetic makcup of the sperm determines the sex of the child in human.
(c) XO and XY type of sex determination is an example of female heterogamety.
(d) Henking (1891) could trace a specific nuclear structure all through oogenesis of few insects.

Qudsiya Anis

Numerade Educator

01:40

Problem 101

Female heterogamety is found in
(a) Human
(b) Drosophila
(c) Chicks
(d) All of these

Qudsiya Anis

Numerade Educator

02:47

Problem 102

Why Mendel's work was not recognized till 1900 ?
(a) His work could not be widely published.
(b) His concept of factor (stable and discrete units that control expression of trait) was not accepted by his contemporaries.
(c) His approach of using mathematics to explain biological phenomenon was totally new and unacceptable by many of the biologists of his time.
(d) All of these

Qudsiya Anis

Numerade Educator

01:58

Problem 103

How many scientists rediscovered mendelism in 1900 independently?
(a) 1
(b) 2
(c) 3
(d) 4

Qudsiya Anis

Numerade Educator

Problem 104

Mendelian rediscoverers are
(a) De Vries, Holland
(b) Correns, Germany
(c) Von Tschermak, Austria
(d) All of these

Qudsiya Anis

Numerade Educator

Problem 105

Who noted that the behaviour of chromosomes was parallel to the behaviour of genes and uses chromosome movement to explain Mendel's law?
(a) T. H. Morgan
(b) Hugo de Vries
(c) Sutton and Boveri
(d) Beadle and Tatum

Qudsiya Anis

Numerade Educator

Problem 105

Qudsiya Anis

Numerade Educator

02:05

Problem 106

Which of the below column A and B represents genes and chromosomes?
(a) A: Gene, B: Gene
(b) A: Chromosome, B: Chromosome
(c) A: Gene, B: Chromosome
(d) A: Chromosome. B; Gene

Qudsiya Anis

Numerade Educator

01:42

Problem 107

Which of the diagrams represents independent assortment?
(a) A only
(b) B only
(c) Both (a) and (b)
(d) None of these

Qudsiya Anis

Numerade Educator

00:56

Problem 108

Identify $\mathrm{A}$ and $\mathrm{B}$ in this figure.
(a) A: Male, B: Female
(b) A: Female, B: Male
(c) A: Male, B: Male
(d) A: Female, B: Female

Qudsiya Anis

Numerade Educator

Problem 109

The method for analyzing inheritance pattern of traits in human being is
(a) DNA finger printing
(b) Control cross
(c) Pedigree analysis
(d) All of these

Qudsiya Anis

Numerade Educator

01:50

Problem 110

The standard symbol used for consanguineous mating in pedigree analysis is
(a)
<smiles>C1CCC(C2CCC2)CC1</smiles>
(b)
<smiles>C1CCC(=C2CCC2)CC1</smiles>
(c)
(d)

Qudsiya Anis

Numerade Educator

01:12

Problem 111

Select the correct matching regarding standard symbol of pedigree analysis
$$
\begin{array}{ll}
\hline \text { Column-I } & \text { Column-II } \\
\hline \text { (A) } & \text { (1) Female } \\
\text { (B) } & \text { (2) Male } \\
\text { (C) } & \text { (3) Mating } \\
\text { (D) } & \text { (4) Sex unspecificd }
\end{array}
$$
(a) $\mathrm{A}: 2, \mathrm{~B}: 1, \mathrm{C}: 4, \mathrm{D}: 2$
(b) A: 2, B : 1, C : 2, D : 4
(c) $\mathrm{A}: 1, \mathrm{~B}: 2, \mathrm{C}: 2, \mathrm{D}: 4$
(d) $\mathrm{A}: 1, \mathrm{~B}: 2, \mathrm{C}: 4, \mathrm{D}: 2$

Qudsiya Anis

Numerade Educator

Problem 112

Which symbol represents parents with male child affected with diseases?
(a)
(b)
(c)
(d)

Qudsiya Anis

Numerade Educator

01:28

Problem 113

Which of the following symbol is not used in pedigree analysis?
(a)
(b)
<smiles>C1CCC(=C2CCCC2)C1</smiles>
(c)
(d)

Qudsiya Anis

Numerade Educator

02:22

Problem 114

The following pedigree shows
(a) Autosomal dominant trait
(b) Autosomal recessive trait
(c) X-linked recessive trait
(d) X-linked dominant trait

Qudsiya Anis

Numerade Educator

Problem 115

The following pedigree shows
(a) Autosomal dominant trait
(b) Autosomal recessive trait
(c) X-linked recessive trait
(d) X-linked dominant trait

Qudsiya Anis

Numerade Educator

01:32

Problem 116

Given below is a pedigree chart of family with five children. It shows the inheritance of attached ear-lobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals.
Which one of the following conclusions drawn is correct?
(a) The parents are homozygous recessive.
(b) The trait is Y-linked.
(c) The parents are homozygous dominant.
(d) The parents are heterozygous.

Dave Kratz

Numerade Educator

03:20

Problem 117

Predict from the following chart
(a) Character is dominant and carried by $\mathrm{x}$ chromosome.
(b) Character is carried by y chromosome.
(c) Character is sex-linked recessive.
(d) Character is autosomal recessive.

Qudsiya Anis

Numerade Educator

Problem 118

The pedigree shows the occurrence of albinism which is a recessive trait. If person 4 is homozygous, the carrier for the trait is
(a) $1,4,5$ and 6
(b) 5 and 6
(c) 1,2 and 3
(d) $1,2,5$ and 6

Qudsiya Anis

Numerade Educator

02:26

Problem 119

This is the pedigree for autosomal recessive disease albinism (aa). What is the probability of II-1 homozygous normal?
(a) $\frac{1}{3}$
(b) $\frac{1}{2}$
(c) $\frac{2}{3}$
(d) $\frac{1}{4}$

Qudsiya Anis

Numerade Educator

01:50

Problem 120

According to the given pedigree, the trait indicates
(a) Autosomal recessive Normal male
(b) X-linked recessive $\bigvee / D$ : Affected male
(c) Maternal imprinting ( ): Normal female
(d) Paternal imprinting $\mathbb{D} D:$ Affected female

Hast Aggarwal

Numerade Educator

02:36

Problem 121

Which of the given pedigree shows inheritance of autosomal recessive gene. What is the genotype of given parents?
(a) $\mathrm{AA}$, aa
(b) $\mathrm{Aa}, \mathrm{AA}$
(c) $\mathrm{aa}, \mathrm{aa}$
(d) $\mathrm{Aa}, \mathrm{Aa}$

Qudsiya Anis

Numerade Educator

02:53

Problem 122

A pedigree is shown below for a disease that is autosomal recessive. The genetic makeup of the first generation will be
(a) $\mathrm{AA}, \mathrm{aa}$
(b) $\mathrm{Aa}, \mathrm{Aa}$
(c) Aa, aa
(d) aa, aa

Qudsiya Anis

Numerade Educator

03:03

Problem 123

$1: 1: 1: 1$ ratio of progenies can be obtained if the plants employed for crossing are
(A) TTRR $\times \mathrm{tRR}$
(B) $\mathrm{TtRr} \times \mathrm{ttr}$
(C) TtRR $\times$ ttrr
(D) Ttrr $\times$ ttRr
(a) $\mathrm{A}, \mathrm{C}$ and $\mathrm{D}$
(b) $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$
(c) $\mathrm{B}$ and $\mathrm{D}$
(d) $\mathrm{A}$ and $\mathrm{B}$

Qudsiya Anis

Numerade Educator

03:05

Problem 124

A pedigree is shown below for a disease that is autosomal dominant. The genetic makeup of the first generation is
(a) $\mathrm{AA}, \mathrm{Aa}$
(b) Aa, aa
(c) $\mathrm{Aa}, \mathrm{AA}$
(d) $\mathrm{Aa}, \mathrm{Aa}$

Qudsiya Anis

Numerade Educator

Problem 125

Failure of segregation of chromatids during cell division cycles results in the gain or loss of a chromosome(s) called
(a) Aneuploidy
(b) Polyploidy
(c) Trisomy
(d) Nullisomy

Qudsiya Anis

Numerade Educator

Problem 126

Down's syndrome occurs due to the gain in cxtra copy of
(a) Chromosome 19
(b) Chromosome 5
(c) Chromosome 21
(d) Chromosome 24

Qudsiya Anis

Numerade Educator

01:38

Problem 127

Turner's syndrome occurs due to the loss of
(a) Chromosome 5
(b) Chromosome 21
(c) Chromosome ' $\mathrm{X}$ '
(d) Chromosome ' $\mathrm{Y}$ '

Qudsiya Anis

Numerade Educator

Problem 128

How many sex chromosomes are present in human cell?
(a) 1 pair
(b) 2 pairs
(c) 3 pairs
(d) 4 pairs

Qudsiya Anis

Numerade Educator

01:23

Problem 129

Gynaecomastia is seen in case of
(a) Down's syndrome
(b) Klinefelter's syndrome
(c) Turner's syndrome
(d) All of these

Qudsiya Anis

Numerade Educator

02:00

Problem 130

The following features belong to which syndrome?
(A) Furrowed tongue
(B) Palm is broad with characteristic palm crease
(C) Physical, psychomotor and mental retardation
(D) Short statured with small round head
(a) Down's syndrome
(b) AIDS
(c) Turner's syndrome
(d) Klinefelter's syndrome

Qudsiya Anis

Numerade Educator

Problem 131

The below diagram shows which type of syndrome?
(a) Down's syndrome
(b) Cri-du chat syndrome
(c) $\mathrm{PKU}$
(d) Turner's syndrome

Qudsiya Anis

Numerade Educator

Problem 132

Increase in a whole set of chromosome in an organism is known as
(a) Polyploidy
(b) Aneuploidy
(c) Trisomy
(d) Tetrasomy

Qudsiya Anis

Numerade Educator

Problem 133

Langdon down described Down's syndrome in which year
(a) 1866
(b) 1890
(c) 1852
(d) 1953

Qudsiya Anis

Numerade Educator

01:23

Problem 134

Two allelic genes are located on
(a) The same chromosomes
(b) Two homologous chromosomes
(c) Two non-homologous chromosomes
(d) Any two chromosomes

Qudsiya Anis

Numerade Educator

02:37

Problem 135

In human beings, the colour of skin is controlled by
(a) Multiple alleles
(b) Lethal genes
(c) Polygenic effect
(d) None of these

Qudsiya Anis

Numerade Educator

01:55

Problem 136

Which of the following is genetically dominant in man?
(a) Colour blindness
(b) Rh positive
(c) Haemophilia
(d) Albinism

Qudsiya Anis

Numerade Educator

01:31

Problem 137

If a certain patient with blood group $\mathrm{B}$ requires immediate blood transfusion, the following type can be given to him
(a) $\mathrm{O}$ and $\mathrm{B}$
(b) $\mathrm{O}$ and $\mathrm{AB}$
(c) A and AB
(d) $\mathrm{B}$ and $\mathrm{AB}$

Qudsiya Anis

Numerade Educator

Problem 138

Karyotype of Klinefelter's syndrome is
(a) $44+\mathrm{XXY}$
(b) $44+\mathrm{XO}$
(c) $44+\mathrm{XYY}$
(d) $44+$ XXXY

Qudsiya Anis

Numerade Educator

Problem 139

Which is not a character of Klinefelter's syndrome?
(a) Masculine development
(b) Gynaecomastia
(c) Fertile individual
(d) Sterile individual

Qudsiya Anis

Numerade Educator

02:03

Problem 140

All are characters of Down's syndrome except
(a) Congenital heart disease
(b) Broad flat face
(c) Small and wrinkled tongue
(d) Many 'loops' on finger tips

Qudsiya Anis

Numerade Educator

02:15

Problem 141

Identify the syndrome of diagrams a and b, respectively.
(a) A: Down's syndrome, B: Turner's syndrome
(b) A: Klinefelter's syndrome, B: Turner's syndrome
(c) A: Turner's syndrome, B: Klinefelter syndrome
(d) A: Turner's syndrome, B: Down's syndrome

Qudsiya Anis

Numerade Educator

01:35

Problem 142

Which karyotype present monosomy?
(a) $2 \mathrm{n}+1$
(b) $2 \mathrm{n}-2$
(c) $2 \mathrm{n}-1$
(d) $2 \mathrm{n}+2$

Qudsiya Anis

Numerade Educator

01:31

Problem 143

Which karyotype represents trisomy?
(a) $2 \mathrm{n}+1$
(b) $2 n-2$
(c) $2 \mathrm{n}-1$
(d) $2 \mathrm{n}+2$

Qudsiya Anis

Numerade Educator

02:33

Problem 144

Find out the total number of Mendelian disorder from the following:
Cystic Fibrosis, Haemophilia, Sickle cell anaemia, Colour blindness, Thalessemia, Phenylketonuria
(a) 4
(b) 5
(c) 6
(d) 3

Qudsiya Anis

Numerade Educator

Problem 145

Which of the following is sex-linked recessive disorder?
(a) Myotonic dystrophy
(b) Sickle-cell anaemia
(c) Haemophilia
(d) Phenylketonuria

Qudsiya Anis

Numerade Educator

02:17

Problem 146

Which of the following is an autosomal dominant trait?
(a) Phenylketonuria
(b) Sickle-cell anaemia
(c) Haemophilia
(d) Myotonic dystrophy

Qudsiya Anis

Numerade Educator

01:36

Problem 147

Queen Victoria was a carrier of which disease?
(a) Myotonic dystrophy
(b) Sickle-cell anaemia
(c) Haemophilia
(d) Phenylketonuria

Qudsiya Anis

Numerade Educator

02:12

Problem 148

Sickle cell anaemia is caused by the substitution of Glutamic acid (Glue) by at the sixth position of the beta globin chain of the haemoglobin molecule.
(a) Asn (Aspargine)
(b) Gly (Glycine)
(c) Arg (Argenine)
(d) Val (Valine)

Qudsiya Anis

Numerade Educator

01:47

Problem 149

Which enzyme is defective in PKU?
(A) DOPA $\stackrel{\text { Enzyme(1) }}{\longrightarrow}$ Melanin
(B) Tyrosine $\stackrel{\text { Enzyme(2) }}{\longrightarrow}$ Thyroxin
(C) Phenylalanine $\stackrel{\text { Enzyme(3) }}{\longrightarrow}$ Tyrosine
(D) Tyrosine $\stackrel{\text { Enyme(4) }}{\longrightarrow}$ Homogentisic acid
(a) Enzyme (A)
(b) Enzyme (B)
(c) Enzyme (C)
(d) Enzyme (D)

Qudsiya Anis

Numerade Educator

01:40

Problem 150

Which of the following is true about Phenylketonuria?
(a) Mental retardation
(b) Accumulation of phenylalanine and phenylpyruvic acid and other derivatives
(c) Autosomal recessive trait
(d) All the above

Qudsiya Anis

Numerade Educator

01:43

Problem 151

The substitution of amino acid in the globin protein results due to the single bass substitution at the sixth codon of the beta globin gene from.
(a) GAG to GGG
(b) CAG to GAG
(c) GAG to GUG
(d) GGC to GGA

Qudsiya Anis

Numerade Educator

01:49

Problem 152

Which of the following amino acid is not present in first six amino acids in affected $\beta$ -chain of Haemoglobin?
(a) Val
(b) Thr
(c) Glu
(d) Lcu

Qudsiya Anis

Numerade Educator

Problem 153

Identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ from the following diagram.
(a) A: CTC; B: GAG; C: Glu
(b) A: GAG; B: CTC; C: Pro
(c) A: CTC; B: GAG; C: Thr
(d) A: CTC; B: GAG; C: Leu

Qudsiya Anis

Numerade Educator

01:45

Problem 154

Identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ from the following diagram.
(a) A: CAC; B: GUG; C: Pro
(b) A: CAC; B: GUG; C: Val
(c) A: CTC, B: GUG, C: Lcu
(d) A: GAC, B: GUG, C: His

Qudsiya Anis

Numerade Educator

01:30

Problem 155

Name the amino acid which has its 2 molecules present in the first 7 amino acid of $\beta$ -chain of haemoglobin.
(a) Val
(b) His
(c) Leu
(d) Glu

Qudsiya Anis

Numerade Educator

03:01

Problem 156

Probability of which of the following is extremely rare?
(a) Carrier female in haemophilia
(b) Carrier male in haemophilia
(c) Affected male in haemophilia
(d) Affected female in haemophilia

Qudsiya Anis

Numerade Educator

01:24

Problem 157

In hemophilia how many proteins that is a part of the cascade of protein involved in clotting of blood affected?
(a) 1
(b) 2
(c) 3
(d) Multiple/many

Qudsiya Anis

Numerade Educator

Problem 158

Diseased phenotype in sickle cell anaemia is shown by which of the following genotype?
(a) $\mathrm{Hb}^{\mathrm{A}} \mathrm{Hb}^{\mathrm{A}}$
(b) $\mathrm{Hb}^{\mathrm{s}} \mathrm{Hb}^{\mathrm{s}}$
(c) $\mathrm{Hb}^{\wedge} \mathrm{Hb}^{\mathrm{s}}$
(d) All of above

Qudsiya Anis

Numerade Educator

01:58

Problem 159

Variation in DNA is due to
(a) Mutation
(b) Recombination
(c) Both (a) and (b)
(d) None of these

Qudsiya Anis

Numerade Educator

Problem 160

Alteration in chromosome may be due to
(a) Deletion of a segment of DNA
(b) Addition of segment of DNA
(c) Duplication of segment of DNA
(d) Any of these

Qudsiya Anis

Numerade Educator

Problem 161

Deletion or insertion of base pairs of DNA causes
(a) Point mutation
(b) Frameshift mutation
(c) Transversion
(d) All of these

Qudsiya Anis

Numerade Educator

02:27

Problem 162

Find out the correct statement.
(a) UV radiation can cause mutation in organism.
(b) Chromosomal aberration are commonly observed in cancer cells.
(c) Mutation is a phenomenon which results in the alteration of DNA sequences and results in changes in the genotype and the phenotype of an organism.
(d) All the above

Qudsiya Anis

Numerade Educator

Problem 163

Mutation that arises due to the change in single base pair of DNA is known as
(a) Point mutation
(b) Frameshift mutation
(c) Silent mutation
(d) Recombination

Qudsiya Anis

Numerade Educator

Problem 164

A classical example of point mutation is
(a) Haemophilia
(b) Sickle cell anaemia
(c) Mangolism
(d) Cri-du chat syndrome

Qudsiya Anis

Numerade Educator

01:29

Problem 165

Which of the following disorders is not hereditary?
(a) Hacmophilia
(b) Cataract
(c) Sickle-cell anaemia
(d) Colour blindness

Qudsiya Anis

Numerade Educator

01:14

Problem 166

A pleiotropic gene is one which
(a) Affects one character
(b) Affects more than onc characters
(c) Both (a) and (b)
(d) Nonc of these

Qudsiya Anis

Numerade Educator

02:01

Problem 167

Phenylketonuria is a genctic disorder of
(a) Trisomic condition
(b) Monosomic condition
(c) Autosomal dominant gene
(d) Autosomal recessive gene
(c) X-linked

Qudsiya Anis

Numerade Educator

Problem 168

Which of the following is not $X$ -linked recessive?
(a) Haemophilia-A
(b) Colour blindness
(c) BETA-Thalassemia
(d) G-6 PD deficiency

Qudsiya Anis

Numerade Educator

01:50

Problem 169

Monosomy and trisomy can be represented as
(a) $2 \mathrm{n}+1,2 \mathrm{n}+3$
(b) $2 \mathrm{n}-1,2 \mathrm{n}-2$
(c) $2 \mathrm{n}, 2 \mathrm{n}+1$
(d) $2 \mathrm{n}-1,2 \mathrm{n}+1$

Qudsiya Anis

Numerade Educator

03:12

Problem 170

Which result proved that there was no blending in Mendelian Cross?
(a) Filial progeny of monohybrid cross
(b) Filial progeny of dihybrid cross
(c) Filial progeny of dihybrid cross
(d) All of these

Qudsiya Anis

Numerade Educator

Problem 171

$\mathrm{F}_{2}$ progeny of Mendelian monohybrid cross between tall and dwarf plant is made up of
(a) Tall plant, identical to their parental type
(b) Dwarf plant, identical to their parental type
(c) Plant with intermediate light were produced
(d) Both (a) and (b)

Qudsiya Anis

Numerade Educator

02:16

Problem 172

Select the incorrect statement.
(a) Capital latter is used to denote dominant trait.
(b) Small latter is used to denote recessive trait.
(c) True breeding variety is represented by similar allele pair of gene.
(d) Alleles are completely similar forms of the same genes.

Qudsiya Anis

Numerade Educator

02:39

Problem 173

Punnett was
(a) Italian botanist
(b) British geneticist
(c) American geneticist
(d) Austrian geneticist

Qudsiya Anis

Numerade Educator

02:01

Problem 174

What is the genotype ratio of Mendelian monohybrid cross?
(a) $3: 1$
(b) $1: 2: 1$
(c) $1: 1$
(d) $3: 2$

Qudsiya Anis

Numerade Educator

02:25

Problem 175

Mendel found that the $\mathrm{F}$, always resembled either one of the parents and that the trait of the other parent was not seen in them. This is due to
(a) Segregation
(b) Dominance
(c) Partial dominance
(d) Unit factor

Qudsiya Anis

Numerade Educator

02:54

Problem 176

In monohybrid cross, the proportion of $3: 1$ explains
(a) Dominance
(b) Segregation
(c) Both (a) and (b)
(d) Unit factor

Qudsiya Anis

Numerade Educator

02:35

Problem 177

In Morgan's experiment, what will be the percentage of recombination in case of body colour and cye colour?
(a) $37.2 \%$
(b) $1.3 \%$
(c) $98.7 \%$
(d) $37.2 \%$

Qudsiya Anis

Numerade Educator

Problem 178

Which symbol of pedigree is correctly matched?
(a) $-$ Female
<smiles>[C-]</smiles>
(b) $-$ Affected offspring
(c) $-$ Affected male of autosomal recessive disease
(d) - Marriage between relatives

Qudsiya Anis

Numerade Educator

02:19

Problem 179

Which of the following was/were applied first time to problems in biology during Mendel's investigations into inheritance?
(a) Statistical analysis
(b) Mathematical logic
(c) Computational devices
(d) Both (a) and (b)

Qudsiya Anis

Numerade Educator

02:37

Problem 180

Mendel proposed how many general rules to consolidate his understanding of inheritance in monohybrid cross?
(a) One
(b) Two
(c) Three
(d) None of the rules, he proposed laws/principles

Qudsiya Anis

Numerade Educator

02:20

Problem 181

In the theoretical explanation of allelic interaction for dominant and recessive forms, the recessive trait is seen due to the production of
(a) Normal or less efficient enzyme
(b) A non-functional enzyme
(c) No enzyme production
(d) Either (b) or (c)

Qudsiya Anis

Numerade Educator

Problem 182

Genes responsible for ABO blood group determines which of the following biomolecules of RBC plasma membrane?
(a) Phospholipid
(b) Proteins
(c) Sugars
(d) Cholesterols

Qudsiya Anis

Numerade Educator

02:32

Problem 183

The shape of seed depends on starch granules size; so inheritance of seed shape shows relationship, while inheritance of starch grains show
(a) Dominant recessive, codominance
(b) Incomplete dominance, codominance
(c) Dominant-recessive, incomplete dominance
(d) Codominance. incomplete dominance

Qudsiya Anis

Numerade Educator

Problem 184

If yellow body, white eyed drosophila is crossed with wild brown body red eyes drosophila. Then what would be the frequency of recombinants in $\mathrm{F}_{1}$ generation?
(a) $100 \%$
(b) $1.3 \%$
(c) $98.7 \%$
(d) $0 \%$

Qudsiya Anis

Numerade Educator

01:17

Problem 185

Chromosomal aberrations are commonly observed in
(a) Germinal cells
(b) Cancer cells
(c) Nail base cells
(d) Gametes

Qudsiya Anis

Numerade Educator

01:28

Problem 186

Which of the following cell cycle cvent is responsible for polyploidy phenomenon?
(a) Failure of karyokinesis
(b) Failure of cytokinesis
(c) Failure of segregation
(d) Failure of spindle apparatus

Qudsiya Anis

Numerade Educator

02:53

Problem 187

Match the following
$$
\begin{array}{ll}
\hline \multicolumn{1}{c} {\text { Column - I }} & \multicolumn{1}{c} {\text { Column - II }} \\
\hline \text { A. Haemophilia } & \text { 1. Board palm with characteristic palm creased } \\
\text { B. Down's syndrome } & \text { 2. Delayed clotting of blood } \\
\text { C. Klinefelter's syndrome } & \text { 3. However feminine development } \\
\text { D. Turner's Syndrome } & \text { 4. Rudimentary ovaries } \\
\hline
\end{array}
$$
(a) A: $1 ; \mathrm{B}: 3 ; \mathrm{C}: 2 ; \mathrm{D}: 4$
(b) A: $2 ;$ B : $1 ;$ C : $3 ;$ D : 4
(c) A: $4 ; \mathrm{B}: 2 ; \mathrm{C}: 1 ; \mathrm{D}: 3$
(d) A: $1 ;$ B : $2 ;$ C : $3 ;$ D : 4

Qudsiya Anis

Numerade Educator

Problem 188

Mendel's Law of independent assortment holds good for genes situated on the
(a) Non-homologous chromosomes
(b) Homologous chromosomes
(c) Extra nuclear genetic element
(d) Same chromosome

Qudsiya Anis

Numerade Educator

01:21

Problem 189

Occasionally, a single gene may express more than one effect. The phenomenon is called
(a) Multiple allelism
(b) Mosaicism
(c) Pleiotropy
(d) Polygeny

Qudsiya Anis

Numerade Educator

01:32

Problem 190

In a certain taxon of insects, some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome bearing organisms are
(a) Males and females, respectively
(b) Females and males, respectively
(c) All males
(d) All females

Qudsiya Anis

Numerade Educator

Problem 191

The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to
(a) Quantitative trait
(b) Mendelian trait
(c) Polygenic trait
(d) Maternal trait

Qudsiya Anis

Numerade Educator

02:11

Problem 192

It is said that Mendel proposed that the factor controlling any character is discrete and independent. This proposition was based on the
(a) Results of $\mathrm{F}_{3}$ generation of a cross.
(b) Observations that the offsprings of a cross made between the plants having two contrasting characters show only one character without any blending.
(c) Self-pollination of $\mathrm{F}_{1}$ offsprings.
(d) Cross-pollination of parental generations.

Qudsiya Anis

Numerade Educator

Problem 193

Two genes 'A'and 'BA' are linked. In a dihybrid cross involving these two genes, the $\mathrm{F}_{1}$ heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?
(a) $1: 1: 1: 1$
(b) $9: 3: 3: 1$
(c) $3: 1$
(d) $1: 1$

Qudsiya Anis

Numerade Educator

05:44

Problem 194

In the $\mathrm{F}_{2}$ generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are
(a) phenotypes-4; genotypes- 16
(b) phenotypes-9; genotypes-4
(c) phenotypes-4; genotypes-8
(d) phenotypes-4; genotypes-9

Qudsiya Anis

Numerade Educator

02:59

Problem 195

Mother and father of a person with ' 0 ' blood group have 'A' and 'B' blood group, respectively. What would be the genotype of both mother and father?
(a) Mother is homozygous for 'A' blood group and father is heterozygous for 'B'.
(b) Mother is heterozygous for 'A' blood group and father is homozygous for ' $\mathrm{B}$ '.
(c) Both mother and father are heterozygous for 'A' and 'B' blood group, respectively.
(d) Both mother and father are homozygous for 'A' and 'B' blood group, respectively.

Qudsiya Anis

Numerade Educator

01:43

Problem 196

Assertion: Gregor Mendel conducted the hybridization experiment on garden peas and proposed the laws of inheritance in living organism. Reason: Mendel selected 7 true breeding pea plant varieties.

Qudsiya Anis

Numerade Educator

Problem 197

Assertion: In a monohybrid cross $\mathrm{F}_{1}$ generation indicates recessive characters. Reason: Dominance occurs only in homozygous state.

Qudsiya Anis

Numerade Educator

01:45

Problem 198

Assertion: Gene which code for a pair of contrasting traits are known alleles. Reason: Alleles are slightly different forms of the same gene.

Qudsiya Anis

Numerade Educator

02:33

Problem 199

Assertion: The law of dominance is used to explain the expression of only one of the parental character is a monohybrid cross in the $\mathrm{F}_{1}$ - generation. Reason: The law of dominance explains the propportion of $3: 1$ obtained at the $\mathrm{F}_{2}$ - generation.

Qudsiya Anis

Numerade Educator

Problem 200

Assertion: Deletions and insertions of base pairs of DNA, causes frame-shift mutation. Reason: A classical example of frame-shift mutation is sickle cell anaemia.

Qudsiya Anis

Numerade Educator

01:17

Problem 201

Assertion: Increase in a whole set of chromosome in an organism is known as polyploidy. Reason: Failure of cytokinesis after telophase stage of cell division results in polyploidy.

Qudsiya Anis

Numerade Educator

03:16

Problem 202

Assertion: Test cross is a back cross. Reason: In test cross, $\mathrm{F}_{1}$ -individual is crossed with recessive parents.

Qudsiya Anis

Numerade Educator

01:25

Problem 203

Assertion: Inheritance of holandric gene are always from father to son. Reason: Holandric genes are found on Y-chromosomes.

Qudsiya Anis

Numerade Educator

Problem 204

Assertion: In humans, the gamete contributed by the male determines whether the child produced will be male or female. Reason: Sex in human is a polygenic trait depending upon a cumulative effect of some gene on X-chromosomes and some on Y-chromosomes.

Qudsiya Anis

Numerade Educator

01:24

Problem 205

Assertion: In birds, the chromosome composition of the sperm determines the sex. Reason: Male birds are heterogametic.

Qudsiya Anis

Numerade Educator

01:18

Problem 206

Assertion: Down's syndrome is chromosomal disorder Reason: It occurs due to trisomy of 21 chromosome.

Qudsiya Anis

Numerade Educator

01:13

Problem 207

Assertion: Female of Turner's syndrome is sterile. Reason: Such female contain rudimentary ovaries.

Qudsiya Anis

Numerade Educator

Problem 208

Assertion: PKU leads to mental retardation Reason: Phenylpyruvic acid and their derivatives are accumulated in brain in PKU.

Qudsiya Anis

Numerade Educator

01:52

Problem 209

Assertion: Sickle cell anaemia is an example of point mutation. Reason: It occur due change in single nucleotide in beta gene.

Qudsiya Anis

Numerade Educator

Problem 210

Assertion: Cystic fibrosis is Mendelian disorder Reason: Tuners syndrome is chromosomal disorder.

Qudsiya Anis

Numerade Educator