Anthro Problemset #2

Anthro Problemset #2 - Veronica VonMosch T.A Anne Pisor...

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Veronica VonMosch T.A. Anne Pisor Section: T @ 6 Anthropology 5 Fall 2009 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? Favorable traits would be diluted by 50% each generation, and would lose their advantage. B. How does the behavior of Mendelian genes differ from this blending model? (hint: what evidence shows that they do not blend?) Characteristics determined by genes are split 50/50 from both parents, but the genes segregate independently. 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? Chromosome: A linear body in the cell nucleus that carries genes and appears during cell division Locus: The position on a chromosome that is occupied by a particular gene. B. Distinguish between the terms gene and allele. Gene: a segment of the chromosome that produces a recognizable effect on phenotype and segregates as a unit during gamete formation Allele: one of two or more or more alternative forms of a gene. For example, the A and S alleles are two forms of the gene controlling the amino
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This note was uploaded on 05/25/2010 for the course ANTH Anth 5 taught by Professor Gaulin during the Spring '10 term at UCSB.

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Anthro Problemset #2 - Veronica VonMosch T.A Anne Pisor...

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