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Biology Concepts and Applications

Cecie Starr, Christine A. Evers, Lisa Starr

Chapter 12

Meiosis and Sexual Reproduction - all with Video Answers

Educators

Chapter Questions

00:43

Problem 1

One evolutionary advantage of sexual over asexual reproduction may be that it produces ________.
a. more offspring per individual
b. more variation among offspring
c. healthier offspring

Aditya Sood
Aditya Sood
Numerade Educator
00:42

Problem 2

Alternative forms of the same gene are called ________.
a. gametes
b. homologous
c. alleles
d. sister chromatids

Aditya Sood
Aditya Sood
Numerade Educator
00:56

Problem 3

Meiosis is a necessary part of sexual reproduction because it ________.
a. divides two nuclei into four new nuclei
b. reduces the chromosome number
c. produces clones that can cross over

Aditya Sood
Aditya Sood
Numerade Educator
00:55

Problem 4

Meiosis________.
a. occurs only in germ cells of animals
b. supports growth and tissue repair in multicelled species
c. gives rise to genetic diversity among offspring
d. is part of the life cycle of all cells

Aditya Sood
Aditya Sood
Numerade Educator
00:23

Problem 5

Sexual reproduction in animals requires ________.
a. meiosis
b. fertilization
c. gametes
d. all of the above

Aditya Sood
Aditya Sood
Numerade Educator
00:34

Problem 6

Dogs have a diploid chromosome number of $78 .$ How many chromosomes do their gametes have?
a. 39
b. 78
c. 156
d. 234

Aditya Sood
Aditya Sood
Numerade Educator
00:55

Problem 7

The cell in the diagram to the right is in anaphase I, not anaphase II. I know this because ________.

Christina Sorrentino
Christina Sorrentino
Numerade Educator
00:21

Problem 8

The cell pictured to the right is in which stage of nuclear division?
a. metaphase II
b. anaphase I
c. anaphase II
d. interphase

Mishal Gul
Mishal Gul
Numerade Educator
00:31

Problem 9

Crossing over mixes up ________.
a. chromosomes
b. alleles
c. zygotes
d. gametes

Aditya Sood
Aditya Sood
Numerade Educator
00:43

Problem 10

Crossing over happens during which phase of meiosis?
a. prophase I
b. prophase II
c. anaphase I
d. anaphase II

Aditya Sood
Aditya Sood
Numerade Educator
00:58

Problem 11

________contributes to variation in traits among the offspring of sexual reproducers.
a. Crossing over
b. Chromosome segregation
c. Fertilization
d. all of the above

Aditya Sood
Aditya Sood
Numerade Educator
02:53

Problem 12

Which of the following is one of the very important differences between mitosis and meiosis?
a. Chromosomes align midway between spindle poles only in meiosis.
b. Homologous chromosomes separate only in meiosis.
c. DNA is replicated before mitosis only.
d. Sister chromatids separate only in meiosis.
e. Interphase occurs only in mitosis.

Sirisa Reddy
Sirisa Reddy
Numerade Educator
01:09

Problem 13

Match each term with its description.
________interphase
________metaphase I
________alleles
________zygotes
________gametes
________males
________prophase I
a. different forms of a gene
b. useful for varied offspring
c. none between meiosis I and meiosis II
d. chromosome lineup
e. haploid
f. form at fertilization
g. mash-up time

Mishal Gul
Mishal Gul
Numerade Educator