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Chapter 13: Meiosis & Sexual Life Cycles
Name
AP Biology
Date
Mr. Mennecke
1. A human cell containing 22 autosomes and a Y chromosome is
a.
b.
c.
d.
a somatic cell of a male
a somatic cell of a female
a sperm cell
an ovum
2. Homologous chromosomes segregate toward opposite poles of a dividing cell during
a. mitosis
b. meiosis I
c. fertilization
d. meiosis II
3. Meiosis II is similar to mitosis in that
a. homologous chromosomes synapse
b. DNA replicates before the division
c. sister chromatids separate during anaphase
d. the chromosomes number is reduced
4. The DNA content of a diploid cell in the G1 phase of the cell cycle is measured. If this DNA content is
X, then the DNA content of the same cell at metaphase of meiosis I would be
a. 0.25 X
d. 2X
b. 0.5 X
e. 4X
c. X
5. If we continued to follow the cell lineage from question 4, then the DNA content at metaphase of
meiosis II would be
a. 0.25 X
b. 0.5 X
c. X
d. 2X
e. 4X
6. How many different combinations of maternal and paternal chromosomes can be packaged in gametes
made by an organism with a diploid number of 8 (2n =8)?
a. 2
d. 16
b. 4
e. 32
c. 8
7. The following choices indicate chromosome number before and after a process. Which choice most
closely corresponds to the process of fertilization?
a. 2n  n
c. n  n
b. n  2n
d. 2n  4n
8. The following choices indicate chromosome number before and after a process. Which choice most
closely corresponds to the process of meiosis?
a. 2n  n
c. 2n  2n
b. n  2n
d. 2n  4n
9. The following choices indicate chromosome number before and after a process. Which choice most
closely corresponds to the process of mitosis?
a. 2n  n
c. n  n
b. 2n  2n
d. 2n  4n
10.
Crossing over contributes to genetic variation when it exchanges chromosomal regions between
a. sister chromatids of a chromosome
c. non-sister chromatids of homologues
b. chromatids of non-homologues
d. autosomes and sex chromosomes
Chapter 13: Meiosis & Sexual Life Cycles
11. In comparing the typical life cycles of plants & animals, a stage found in plants but not in animals is a
a. gamete
b. zygote
c. multicellular diploid
d. multicellular haploid
12. Sexual reproduction requires
a. meiosis
b. gamete formation
c. fertilization
d. all of the above
13. Meiosis is a division mechanism that produces
a. 2 cells
b. 2 nuclei
c. 4 cells
d. 4 nuclei
14. An animal cell having 2 rather than one of each type of chromosome has a _______ chromosome
number.
a. diploid
b. haploid
c. normal gamete
d. both b and c
15. Meiosis ____________ the parental chromosome number.
a. doubles
b. reduces
c. maintains
d. corrupts
16. Generally, a pair of homologous chromosomes
a. carry the same genes
b. are the same length and shape
c. interact at meiosis
d. all of the above
17. Before the onset of meiosis, all chromosomes are
a. condensed
b. released from protein
c. duplicated
d. both b and c
18. Each chromosome moves away from its homologue and ends up at the opposite spindle pole during
a. prophase I
b. prophase II
c. anaphase I
d. anaphase II
19. Sister chromatids of each chromosome move apart and end up at opposite spindle poles during
a. prophase I
b. prophase II
Matching:
20. chromosome #
21. alleles
22. metaphase I
23. interphase
c. anaphase I
d. anaphase II
a.
b.
c.
d.
different molecular form of the same gene
none between meiosis I and II
pairs of homologous chromosomes align at the spindle equator
sum total of chromosomes in all cells of a given type