Lec19_HWE_handout - BioG1780 Evolution and Biodiversity...

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BioG1780 Fall 2010 Evolution and Biodiversity Today’s lecturer: Matt Hare Lectures 19: Oct 13, 2010 HARDY WEINBERG EQUILIBRIUM TEXT READING: Ch. 6, section 1 Reminder: Check blackboard for next week’s discussion section assignment. You need to read the assignment and work through some of the Hardy-Weinberg simulations before going to section [week of October 18]. This lecture is the second in a series on the related topics of microevolution, population genetics, and quantitative genetics. Today we will define the baseline against which we will measure genetic change (i.e., evolution); we will derive the expectations for allele and genotype frequencies when no evolutionary processes are occurring in a population. The next four lectures will cover deviations from this “null” no-evolution model: selection, genetic drift, mutation, and gene flow. A. Four Mechanisms of Evolutionary Change 1. Recall that evolution can be defined as any allele frequency change in a population . 2.
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Lec19_HWE_handout - BioG1780 Evolution and Biodiversity...

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