Chapter 2 Answers to Homework Problems (1)

Chapter 2 Answers to Homework Problems (1) - Ans: (1)...

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Chapter 2 Answers to Homework Problems 4. Questions and Problems, 2.4 Distinguish between the haploid and diploid states. What types of cells are haploid? What types of cells are diploid? Ans: In the haploid state, each chromosome is represented once; in the diploid state, each chromosome is represented twice. Among multicellular eukaryotes, gametes are haploid and somatic cells are diploid. 9. Questions and Problems, 2.9 Match the stages of mitosis with the events they encompass: Stages: (1) anaphase, (2) metaphase, (3) prophase, (4) telophase. Events: (a) reformation of the nucleolus, (b) disappearance of the nuclear membrane, (c) condensation of the chromosomes, (d) formation of the mitotic spindle, (e) movement of chromosomes to the equatorial plane, (f) movement of chromosomes to the poles, (g) decondensation of the chromosomes, (h) splitting of the centromere, (i) attachment of microtubules to the kinetochore.
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Unformatted text preview: Ans: (1) Anaphase: (f), (h); (2) metaphase: (e), (i); (3) prophase: (b), (c), (d); (4) telophase: (a), (g). 12. Questions and Problems, 2.12 A Drosophila sperm cell contains four chromosomes. How many chromosomes would be present in a spermatogonial cell about to enter meiosis? How many chromatids would be present in a spermatogonial cell at metaphase I of meiosis? How many would be present at metaphase II? Ans: There are 8 chromosomes in a Drosophila spermatogonial cell about to enter meiosis. There are 16 chromatids in a Drosophilia spermatogonial cell at metaphase I of meiosis. There are 8 chromatids in a Drosophilia cell at metaphase II of meiosis. 15. Questions and Problems, 2.15 During meiosis, when does chromosome disjunction occur? When does chromatid disjunction occur? Ans: Chromosome disjunction occurs during anaphase I. Chromatid disjunction occurs during anaphase II....
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This note was uploaded on 01/26/2011 for the course BIOLOGY 4003 taught by Professor Matthews during the Spring '10 term at Minnesota.

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