Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 5, Problem 16P
Figure 5.7a shows chromosomes during prophase of meiosis I in a mouse primary spermatocyte.
a. | How would you know immediately that this figure shows male meiosis in a mouse and not in a human? (Hint: In mice, n = 20.) |
b. | Are most mouse chromosomes metacentric or acrocentric? Explain. |
c. | How many chromatids in total are represented in Fig. 5.7a? |
d. | Where is the X-Y bivalent in Fig. 5.7a? (Note: Mouse sex chromosomes have only a single pseudoautosomal region, instead of two as in humans.) Diagram this bivalent, showing the X and Y chromosomes, the locations of the centromeres of these chromosomes, and the pseudoautosomal region |
e. | Explain the importance of the pseudoautosomal region(s) of the sex chromosomes of mammals for ensuring proper sex chromosome segregation during meiosis. |
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Chapter 5 Solutions
Genetics: From Genes to Genomes
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