202hw3_KEY - Biology 202 Homework 3 Due: 9/18 or 9/19; in...

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Biology 202 Homework 3 Due: 9/18 or 9/19; in discussion Please type (not hand-write) ONLY the answers to question onto the question sheet itself (this sheet). Please highlight or otherwise indicate the parts that you have typed with italics , underlining or bold ing. All of these questions require additional working. The work done to answer the questions should not be on this sheet but instead attached to the back as supplemental pages. You must include all of your work pages. The supplemental work pages do not need to be typed 1. The figure below represent a cell with a diploid number of 4 (2N=4) at the end of the G 2 phase of the cell cycle. The individual is heterozygous for three genes and the positions of three gene loci are indicated. Draw meiotic products resulting from the indicated cross-over between chromosomes 1A and 1B. Include all possible gametic genotypes given independent assortment. Solution:  (3 pts) Case I no cross-over : DD          Combine with TT or tt           DRT, DRt RR dd          Combine with TT or tt           drT, drt rr 1A 1B 2A 2B D d T t R r
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Case II with cross-over: Dd          Combine with TT or tt           DRT,  DRt, dRT, dRt RR Dd          Combine with TT or tt           DrT, Drt, drT, drt rr  2 DRT : 2 DRt : 1 DrT : 1 Drt : 1 dRT : 1 dRt : 2 drT : 2 drt 2. The amount of DNA per cell of a particular species was measured in cells found in
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This note was uploaded on 10/22/2008 for the course BIOLOGY 202 taught by Professor Howe during the Fall '08 term at New Mexico.

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202hw3_KEY - Biology 202 Homework 3 Due: 9/18 or 9/19; in...

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