Anthropology5_Problem_Set_2

Anthropology5_Proble - Anthropology 5 Problem Set 2 To do this problem set you should have read Chapter 2 of your textbook and attended the first

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Anthropology 5 Problem Set # 2 To do this problem set you should have read Chapter 2 of your textbook and attended the first three lectures. 1. To be subject to evolution by natural selection a trait must be transmitted reliably from parent to offspring. A. In Darwin’s day, people believed in a “fluid” or “blending” model of heredity. Why would such a system not support evolution by natural selection? In Natural Selection there is no “blending” because a trait is either passed on or not, depending on if it’s advantageous. If traits did mix then it would mean Natural Selection wouldn’t filter out the disadvantageous traits, and would instead create a new trait, something that doesn’t happen in reality. B. How does the behavior of Mendelian genes differ from this blending model? (hint: what evidence shows that they do not blend?) Mendelian genes are particles, not fluids. Adults have double a double dose of particles (diploid adults). Adults give only half of their double dose to each offspring (haploid gametes). Some particles have stronger effects than others (dominance). 2. Genes are organized, not just randomly arranged, in the cell nucleus. Let’s detail this organization by defining some terms. A. What is a chromosome and what is a locus?
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This note was uploaded on 08/25/2011 for the course ANTH 5 taught by Professor Gaulin during the Fall '07 term at UCSB.

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Anthropology5_Proble - Anthropology 5 Problem Set 2 To do this problem set you should have read Chapter 2 of your textbook and attended the first

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