BIO 325 - Fall 2007 - TTh 11 to 1230 - I Exam - Key only

BIO 325 - Fall 2007 - TTh 11 to 1230 - I Exam - Key only -...

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GENETICS (BIO 325) Fall 2007 T, Th 11:00 – 12:30 PM Key - I Exam 9/25/07 Total points: 100 __________________________________________________________________________________________________ 1. 5/8 The probability that both children will be pigmented is ¾ x ¾ = 9/16. The probability that both children will be albinos is ¼ x ¼ = 1/16. The probability that both children will be pigmented or albinos is 9/16 + 1/16 = 5/8 2. The probability that an additional child will be normal is ¾. The probability that all the three additional children will be normal is ¾ x ¾ x ¾ = 27/64 3. (b) 0.031 4. (a) Independent assortment ii (b) Recessive iii (c) Dihybrid cross iv (d) Test cross v (e) Alleles i 5. (a) True (b) False (c) True (d) False (e) True 6. X-linked dominant
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Unformatted text preview: 7. (c) 8. (a) (b) 1/18 9. (a) All daughters are expected to be normal; all sons are expected to be colorblind. (b) All daughters are expected to be normal; 50% sons are expected to be colorblind. 10. (a) Meiosis I Meiosis II Mitosis (b) 3 11. Meiosis I (1) a, (2) c, (3) b, (4) d. 12. (d) 13. (a) heterochromatin, euchromatin (b) The DNA is much tightly packed in the heterochromatic regions and is loosely packed in the euchromatic regions. 14. 32; increase 15. AB 30% ab 30% Ab 20% aB 20% 16. 42.5% 17. (d) 18. (a) B-A-C (b) Distance between B and A is 15 m.u. and distance between A and C is 10 m.u. . 19. (a) X C /X c , X c /X c (b) 1/4 20. (i) 2.57 (ii) 3 (iii) about 0.5 (iv) accept 2 3...
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This note was uploaded on 03/20/2008 for the course BIO 325 taught by Professor Saxena during the Spring '08 term at University of Texas.

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BIO 325 - Fall 2007 - TTh 11 to 1230 - I Exam - Key only -...

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