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hw1 - Genetics Homework#1 Due in lecture Tuesday Aug 12 1...

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Unformatted text preview: Genetics Homework #1 Due in lecture Tuesday, Aug. 12 1. Normally, a diploid meiocyte divides during meiosis I to yield two haploid secondary meiocytes. These undergo another division (meiosis II) to produce four haploid gametes. Imagine that you are studying the products of meiosis in a novel insect species. You see that instead of a haploid secondary meiocyte, these insects produce a diploid secondary meiocyte. The gametes are still haploid, however. Diagram the process of meiosis in this novel insect by drawing the primary meiocyte, the secondary meiocyte, and the gametes produced. Your insect has 2 pairs of chromosomes, one long and metacentric with the marker A on one copy, a on the other copy; the other chromosome pair is short and telocentric with the marker B on one copy, b on the other. Contrast this with a similar diagram of normal meiosis sidebyside. Show only one possible combination for the A and B markers. 2. For the three experiments that helped to prove that DNA is the hereditary material (section 10.3), describe the experimental methods, and explain what controls were (or should have been) used. Don't give too many details; I want you to give the big picture, so no need to list what strains were used, for example. Just say if one strain caused death under normal circumstances and the other didn't. 3. Complete the "Exploring Genomics" exercise from the end of chapter 10 (p. 272 273). Include the answer to each question. ...
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