OpenStax Biology 2e Instructor Answer Guide
Biology 2e
Unit 3: Genetics
Chapter 11: Meiosis and Sexual Reproduction
Visual Connection Questions
1. If a mutation occurs so that a fungus is no longer able to produce a minus mating type, will it
still be able to reproduce?
Yes, it will be able to reproduce asexually.
Review Questions
2. Meiosis usually produces ________ daughter cells.
c. four haploid
3. What structure is most important in forming the tetrads?
b. synaptonemal complex
4. At which stage of meiosis are sister chromatids separated from each other?
d. anaphase II
5. At metaphase I, homologous chromosomes are connected only at what structures?
a. chiasmata
6. Which of the following is not true in regard to crossover?
a. Spindle microtubules guide the transfer of DNA across the synaptonemal complex.
7. What phase of mitotic interphase is missing from meiotic interkinesis?
c. S phase
, OpenStax Biology 2e Instructor Answer Guide
8. The part of meiosis that is similar to mitosis is ________.
c. meiosis II
9. If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be
in a gamete of that same organism?
b. 16
10. Which statement best describes the genetic content of the two daughter cells in prophase II
of meiosis?
b. haploid with two copies of each gene
11. The pea plants used in Mendel’s genetic inheritance studies were diploid, with 14
chromosomes in somatic cells. Assuming no crossing over events occur, how many unique
gametes could one pea plant produce?
b. 128
12. How do telophase I and telophase II differ during meiosis in animal cells?
d. Chromosomes can remain condensed at the end of telophase I, but decondense after
telophase II.
13. What is a likely evolutionary advantage of sexual reproduction over asexual reproduction?
c. Sexual reproduction results in variation in the offspring.
14. Which type of life cycle has both a haploid and diploid multicellular stage?
d. alternation of generations
15. What is the ploidy of the most conspicuous form of most fungi?
b. haploid
16. A diploid, multicellular life-cycle stage that gives rise to haploid cells by meiosis is called a
________.
a. sporophyte
17. Hydras and jellyfish both live in a freshwater lake that is slowly being acidified by the runoff
from a chemical plant built upstream. Which population is predicted to be better able to cope
with the changing environment?
a. jellyfish
18. Many farmers are worried about the decreasing genetic diversity of plants associated with
generations of artificial selection and inbreeding. Why is limiting random sexual reproduction of
food crops concerning?
c. Larger portions of the plant populations are susceptible to the same diseases.
Biology 2e
Unit 3: Genetics
Chapter 11: Meiosis and Sexual Reproduction
Visual Connection Questions
1. If a mutation occurs so that a fungus is no longer able to produce a minus mating type, will it
still be able to reproduce?
Yes, it will be able to reproduce asexually.
Review Questions
2. Meiosis usually produces ________ daughter cells.
c. four haploid
3. What structure is most important in forming the tetrads?
b. synaptonemal complex
4. At which stage of meiosis are sister chromatids separated from each other?
d. anaphase II
5. At metaphase I, homologous chromosomes are connected only at what structures?
a. chiasmata
6. Which of the following is not true in regard to crossover?
a. Spindle microtubules guide the transfer of DNA across the synaptonemal complex.
7. What phase of mitotic interphase is missing from meiotic interkinesis?
c. S phase
, OpenStax Biology 2e Instructor Answer Guide
8. The part of meiosis that is similar to mitosis is ________.
c. meiosis II
9. If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be
in a gamete of that same organism?
b. 16
10. Which statement best describes the genetic content of the two daughter cells in prophase II
of meiosis?
b. haploid with two copies of each gene
11. The pea plants used in Mendel’s genetic inheritance studies were diploid, with 14
chromosomes in somatic cells. Assuming no crossing over events occur, how many unique
gametes could one pea plant produce?
b. 128
12. How do telophase I and telophase II differ during meiosis in animal cells?
d. Chromosomes can remain condensed at the end of telophase I, but decondense after
telophase II.
13. What is a likely evolutionary advantage of sexual reproduction over asexual reproduction?
c. Sexual reproduction results in variation in the offspring.
14. Which type of life cycle has both a haploid and diploid multicellular stage?
d. alternation of generations
15. What is the ploidy of the most conspicuous form of most fungi?
b. haploid
16. A diploid, multicellular life-cycle stage that gives rise to haploid cells by meiosis is called a
________.
a. sporophyte
17. Hydras and jellyfish both live in a freshwater lake that is slowly being acidified by the runoff
from a chemical plant built upstream. Which population is predicted to be better able to cope
with the changing environment?
a. jellyfish
18. Many farmers are worried about the decreasing genetic diversity of plants associated with
generations of artificial selection and inbreeding. Why is limiting random sexual reproduction of
food crops concerning?
c. Larger portions of the plant populations are susceptible to the same diseases.
