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Unformatted text preview: iv (d) Test cross v (e) Alleles i 14. 24% 15. (a) Trans (b) 20% 16. 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. 17. (a) X C /X c , X c /X c (b) 1/4 18. (a) heterochromatin, euchromatin (b) The DNA is much tightly packed in the heterochromatic regions and is loosely packed in the euchromatic regions. 19. 32; increase. 20. (i) 2.57 (ii) 3 (iii) about 0.5 (iv) accept 2...
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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 at Austin.
- Spring '08