Chapter 5 Answers to Homework Problems

Chapter 5 Answers - Chapter 5 Answers to Homework Problems 1 Questions and Problems 5.1 What are the genetic differences between male and

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Chapter 5 Answers to Homework Problems. 1. Questions and Problems, 5.1 What are the genetic differences between male- and female-determining sperm in animals with heterogametic males? Ans: The male-determining sperm carries a Y chromosome; the female-determining sperm carries an X chromosome. 2. Questions and Problems, 5.2 A male with singed bristles appeared in a culture of Drosophila. How would you determine if this unusual phenotype was due to an X-linked mutation? Ans: Cross the singed male to wild-type females, and then intercross the offspring. If the singed bristle phenotype is due to an X-linked mutation, approximately half the F 2 males, but none of the F 2 females, will show it. 5. Questions and Problems, 5.5 What are the sexual phenotypes of the following genotypes in Drosophila : XX, XY, XXY, XXX, XO? Ans: XX is female, XY is male, XXY is female, XXX is female (but barely viable), XO is male (but sterile). 7. Questions and Problems, 5.7 If a father and son both have defective color vision, is it likely that the son inherited the trait from his father? Ans:
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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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Chapter 5 Answers - Chapter 5 Answers to Homework Problems 1 Questions and Problems 5.1 What are the genetic differences between male and

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