d. clones. e. gametes. At the end of the first meiotic division, each chromosome
ID: 60306 • Letter: D
Question
d. clones. e. gametes. At the end of the first meiotic division, each chromosome consists of a. chiasmata. b. a homologous chromosome pair. c. four copies of each DNA molecule. d. two chromatids. e. a pair of polar microtubules. 8. The four haploid nuclei found at the end of meiosis differ from one another in their exact genetic composition, Some of this difference is the result of a. cytokinesis. b. replication of DNA during the S phase, c. separation of sister chromatids at anaphase II d. spindle formation. e. crossing over during prophase I 9. One difference between mitosis and meiosis I is that a. homologous chromosome pairs synapse during mitosis. b. chromosomes do not replicate in the interphase preceding meiosis. c. homologous chromosome pairs synapse during meiosis but not during mitosis. d. spindles composed of microtubules are not required during meiosis. e. sister chromatids separate during meiosis but not during mitosis. 10. Which of the following does not occur during interphase? a. DNA replication b. The synthesis of cellular components necessary for mitosis c. The generation of sister chromatids d. The condensation of chromatin e. None of the above; all occur during interphase. 11. A cell in G2 contains 36 sister chromatids. This same cell in Gl would have a. 18 chromosomes. b. 36 chromosomes. c. 18 sister chromatids. d. 36 sister chromatids. e. 72 sister chromatids. 12. Which of the following, about anaphase, is true?) a. It is the phase when sister chromatids separate and move to opposite poles. b. It involves chromosomes lining up at the equatorial plate. c. It occurs before the nuclear envelope breaks down. d. It takes place just before cytokinesis. e. It takes place immediately after prophase.Explanation / Answer
7. d. two chromatids
8. e. Crossing over during prophase I.
9. c. homologous chromosome pairs synapse during meiosis but not during mitosis.
10. a. DNA replication.
11. a. 18 chromosomes.
12. c. It occur before the nuclear envelope breaks down.
13. b. sister chromatids are separated.
14. e. prometaphase.
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