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BIO 325 - Fall 2008 - TTh 200 to 330 - I Exam - Key

BIO 325 - Fall 2008 - TTh 200 to 330 - I Exam - Key - 9...

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GENETICS (BIO 325) Fall 2008 T, Th 2:00 – 3:30 PM Key - I Exam __________________________________________________________________________________ 1. (a) 8 (b) 8 2. (d) 3. (a) 24 (b) 48 (c) 48 (d) 12 (e) 24 4. v + /v ; b + /b x v/v ; b + /b 5. (a) True (b) False (c) True (d) False (e) True 6. (a) Meiosis (b) Meiosis (c) Mitosis (d) Mitosis (e) Mitosis 7. Spools, 10 nm, coils, 30 nm, supercoil. 8. The human X and Y chromosomes have two homologous regions, one at each end. In being homologous these regions are autosomal-like, so they are called pseudoautosomal regions 1 and 2. One or both of these regions pair during meiosis, and undergo crossing over. In this way, the X and Y can act as a pair and segregate equally into the gametes.
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Unformatted text preview: 9. Yellow 10. (a) Or any other combination as long as the homologous chromosomes are opposite each other and the two sister chromatids carry identical alleles (b) c C C c c C 11. 1/12 12. Autosomal Dominant 13. (i) (d) (ii) Probability of having an affected child is 50% 14. Genes A and B are not assorting independently. The chi-square value is 16.11. The hypothesis is rejected. 15. 15% 16. Cis 17. 12.5 % 18. (a) 20% (b) 30% 19. C D/c d; E/e 20. (a) 0.36 (b) 0.04 (c) 0.09 (d) 0.01 2 c C...
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