Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 24P
In a species of fish, a black spot on the dorsal fin is observed in males and females. A fish breeder carries out a pair of reciprocal crosses and observes the following results.
Cross I Parents: black-spot male ×nonspotted female
Progeny: 22 black-spot males
24 black-spot females
25 nonspotted males
21 nonspotted females
Cross II Parents: nonspotted male × black-spot female
Progeny: 45 black-spot males
53 nonspotted females
a. Why does this evidence support the hypothesis that a black spot is sex linked?
b. Identify which sex is heterogametic. Give genotypes for the parents in each cross, and explain the progeny proportions in each cross.
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Chapter 3 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
Ch. 3 - Examine the following diagrams of cells from an...Ch. 3 - Our closest primate relative, the chimpanzee, has...Ch. 3 -
3. In a test of his chromosome theory of...Ch. 3 - Cohesion between sister chromatids, as well as...Ch. 3 - 5. The diploid number of the hypothetical animal...Ch. 3 - 6. An organism has alleles R1 and R2 on one pair...Ch. 3 - Explain how the behavior of homologous chromosomes...Ch. 3 - 8. Suppose crossover occurs between the homologous...Ch. 3 -
9. Alleles A and a are on one pair of autosomes,...Ch. 3 - Prob. 10P
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