Chapter 20.docx - Chapter 20 Genes Within Populations...

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Chapter 20: Genes Within Populations Genetic variation: differences in alleles in a population Evolution: change over time Charles Darwin – descent w/ modification Hardy-Weinberg Equilibrium o Predicts genotype frequencies o No change if: 1. No mutation 2. No genes from outside sources 3. Random mating 4. Population is very large 5. No selection occurs P 2 + 2pq + q 2 = 1 5 Agents of Evolution
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