1. Meiosis and Sexual Life Cycles10
Meiosis and Sexual Life Cycles
Questions prepared by
Brad Stith, University of Colorado Denver
Louise Paquin, McDaniel College

2. Which of the following transmits genes from both parents to child, or from one generation of a family to another?
DNA
gametes
somatic cells
mitosis
nucleotides
Answer: B

3. Which of the following transmits genes from both parents to child, or from one generation of a family to another?
DNA
gametes
somatic cells
mitosis
nucleotides 3

4. Fertilization is to zygote as meiosis is to which of the following?
mitosis
diploid
chromosome
replication
gamete
Answer: E
Discuss why. 4

5. Fertilization is to zygote as meiosis is to which of the following?
mitosis
diploid
chromosome
replication
gamete 5

6. Privet chromosomes undergo only mitosis.
Privet shrubs and humans each have a diploid number of 46 chromosomes per cell. Why are the two species so dissimilar?
Privet chromosomes undergo only mitosis.
Privet chromosomes are shaped differently.
Human chromosomes have genes grouped together differently.
The two species have appreciably different genes.
Privets do not have sex chromosomes.
Answer: D 6

7. Privet chromosomes undergo only mitosis.
Privet shrubs and humans each have a diploid number of 46 chromosomes per cell. Why are the two species so dissimilar?
Privet chromosomes undergo only mitosis.
Privet chromosomes are shaped differently.
Human chromosomes have genes grouped together differently.
The two species have appreciably different genes.
Privets do not have sex chromosomes. 7

8. Why is it more practical to prepare karyotypes by viewing somatic diploid cells rather than haploid gametes?
Answer: Cells can be made to divide and mitosis can be halted at metaphase; both sets of chromosomes need to be examined. 8

9. Diploid cells may undergo either mitosis or meiosis. Can haploid cells
Diploid cells may undergo either mitosis or meiosis. Can haploid cells? Why or why not?
Answer: Haploid cells cannot undergo meiosis because the chromosomes cannot pair. 9

10. How and at what stage do chromosomes undergo independent assortment?
meiosis I pairing of homologs
anaphase I separation of homologs
meiosis II separation of homologs
meiosis I metaphase alignment
meiosis I telophase separation
Answer: D 10

11. How and at what stage do chromosomes undergo independent assortment?
meiosis I pairing of homologs
anaphase I separation of homologs
meiosis II separation of homologs
meiosis I metaphase alignment
meiosis I telophase separation 11

12. What allows sister chromatids to separate in which phase of meiosis?
release of cohesin along sister chromatid arms in anaphase I
crossing over of chromatids in prophase I
release of cohesin at centromeres in anaphase I
release of cohesin at centromeres in anaphase II
crossing over of homologs in prophase I
Answer: D 12

13. What allows sister chromatids to separate in which phase of meiosis?
release of cohesin along sister chromatid arms in anaphase I
crossing over of chromatids in prophase I
release of cohesin at centromeres in anaphase I
release of cohesin at centromeres in anaphase II
crossing over of homologs in prophase I 13

14. What are three ways in which gametes from one individual diploid cell can be different from one another?
Answer: mutation, crossing over, independent assortment 14

15. Prophase I of meiosis is generally the longest phase of meiosis
Prophase I of meiosis is generally the longest phase of meiosis. Why might this be?
Answer: Chromosomes must pair and cross over, besides the cell going through mitosis-like morphological changes such as spindle formation and chromosome condensation. 15

16. In this cell, what phase is represented?
mitotic metaphase
meiosis I anaphase
meiosis I metaphase
meiosis II anaphase
meiosis II metaphase
Answer: C
(see Figure 10.8) 16

17. In this cell, what phase is represented?
mitotic metaphase
meiosis I anaphase
meiosis I metaphase
meiosis II anaphase
meiosis II metaphase 17