The best statement of Mendel's principle of independent assortment is that
a. one allele is always independently dominant to another
b. independent hereditary units from the male and female parents are blended in the offspring
c. two hereditary units that influence certain independent traits separate during gamete formation
d. genes on pairs of homologous chromosomes are distributed into one gamete or another independently of genes on pairs of other chromosomes
e. the two genes of each pair are separated from each other during meiosis, so they end up in different gametes
All the different molecular forms of the same gene are called.
a. chiasmata
b. alleles
c. autosomes
d. genes
e. mutations
In the F_(2) generation of a monohybrid cross involving complete dominance, the expected phenotypic ratio is
a. 3:1
b. 1:1:1:1
c. 1:2:1
d. 1:1
e. 1:3:1
In the F_(2) generation of a cross between a red-flowered snapdragon (homozygous) and a white-flowered snapdragon, the expected phenotypic ratio of the offspring is
a. (3)/(4) red, (1)/(4) white.
b. 100 percent red
c. (1)/(4) red, (1)/(2) pink, (1)/(4) white
(d.) 100 percent pink
e. (1)/(2) red, (1)/(2) white
In a testcross, F_(1) hybrids are crossed to an individual known to be for the trait.
a. heterozy golis
b. homozygous dominant
c. homozygous
d. homozygous recessive
e. heterozygous dominant
The tendency for dogs to bark while trailing is determined by a dominant gene, S, whereas silent trailing is due to the recessive gene, s. In addition, erect ears, D, is dominant over drooping ears, d. What combination of offspring would be expected from a cross between two erecteared barkers who are heterozygous for both genes? .i., ...: :-:
a. 1/4 erect barkers, (1)/(4) drooping barkers, (1)/(4) erect silent, (1)/(4) drooping silent
b. (9)/(16) erect barkers, (3)/(16) drooping barkers, (3)/(16) erect silent, (1)/(16) drooping silent
c. (1)/(2) erect barkers, (1)/(2) drooping barkers
d. 9/16 drooping barkers, (3)/(16) erect barkers, (3)/(16) drooping silent, 1/16 erect silent
e. (3)/(4) erect barkers, (1)/(4) drooping barkers
A man with type A blood could be the father of
a. a child with type A blood
b. a child with type B blood
c. a child with type O blood
d. a child with type AB blood
e. all of the above
Alleles at one chromosome locus may affect two or more traits in good or bad ways. This outcome of the activity of one gene's product is
a. pleiotropy
b. epistasis
c. a mosaic effect
d. continuous variation
e. gene interaction
1. The best statement of Mendel's principle of independent assortment is that a. one allele is always independently dominant to another b. independent hereditary units from the male and female parents are blended in the offspring c. two hereditary units that influence certain independent traits separate during gamete formation d. genes on pairs of homologous chromosomes are distributed into one gamete or another independently of genes on pairs of other chromosomes e. the two genes of each pair are separated from each other during meiosis, so they end up in different gametes 2.All the different molecular forms of the same gene are called
5.In a testcross,F hybrids are crossed to an individual known to be for the trait. a.heterozygous b. homozygous dominant c.homozygous d. homozygous recessive e. heterozygous dominant
6. The tendency for dogs to bark while trailing is determined by a dominant gene, S, whereas silent trailling is due to the recessive gene, s. In addition, erect ears,D, is dominant over drooping ears,d.What combination of offspring would be expected from a cross between two erect eared barkers who are heterozygous for both genes?... a.1/4 erect barkers,1/4 drooping barkers 1/4 erect silent,1/4 drooping silent b.9/16 erect barkers,3/16 drooping barkers,3/16 erect silent,1/16 drooping silent c.1/2 erect barkers,1/2 drooping barkers d.9/16 drooping barkers,3/16 erect barkers, 3/16 drooping silent, 1/16 erect silent e.3/4 erect barkers,1/4 drooping barkers 7. A man with type A blood could be the father of a. a child with type A blood b. a child with type B blood c. a child with type O blood d. a child with type AB blood e.all of the above
a. chiasmata b.)alleles c. autosomes d.genes e.mutations
3. In the F generation of a monohybrid cross involving complete dominance, the expected phenotypic ratio is
a.3:1 b.1:1:1:1 c.1:2:1 d.1:1 e.1:3:1
8. Alleles at one chromosome locus may affect two or more traits in good or bad ways. This outcome of the activity of one gene's product is a. pleiotropy b. epistasis c. a mosaic effect d. continuous variation e. gene interaction
1.In the F generation of a cross between a red-flowered snapdragon (homozygous) and a white-flowered snapdragon, the expected phenotypic ratio of the offspring is a.3/4red,1/4 white b.100 percent red c.1/4 red,1/2 pink,1/4 white 100 percent pink e.1/2red,1/2white