lecture 1-30 population genetics

lecture 1-30 population genetics - Chapter 23 (pp.454-462)...

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Chapter 23 (pp.454-462) Population Genetics Learning objectives Be able to explain the statement “It’s the population, not the individual, that evolves”. Learn how to use the Hardy-Weinberg equation to predict genotype frequencies in a population. List the five conditions that must be met for a population to remain in Hardy-Weinberg equilibrium. Explain why meiosis and random fertilization alone will not alter the frequency of alleles or genotypes in a population. Explain why mutation has little quantitative effect on allele frequencies in a large population. Understand why the majority of point mutations are harmless. Explain what is meant by the statement: “Only natural selection leads to the adaptation of organisms to their environment”. Describe genetic drift; explain the role of population size in genetic drift. Distinguish between the bottleneck effect and the founder effect. Describe what gene flow is and how it can reduce genetic differences between adjacent populations.
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Chapter 23 [pp. 454-462] The Evolution of Populations Three Important Concepts: 1. Population genetics provides a foundation for studying evolution 2. Mutation and sexual recombination produce the variation that makes evolution possible 3. Natural selection, genetic drift, and gene flow can alter a population’s genetic composition
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A common misconception about evolution is that individual organisms evolve during their lifetimes (wrong! At least not in the Darwinian sense) Natural selection acts on individuals, but populations evolve The Modern Synthesis Integrates Mendelian genetics with the Darwinian theory of evolution by natural selection Focuses on populations as the smallest units of evolution
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This note was uploaded on 03/19/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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lecture 1-30 population genetics - Chapter 23 (pp.454-462)...

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