CH 15_student_outine - How Organisms Evolve Chapter 15...

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How Organisms Evolve How Organisms Evolve Chapter 15 Chapter 15
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Using Knowledgeof Evolution to Fight Disease
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The Causes of Evolution 1. 2. 3. 1. 1. - -
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Population Genetics and Evolution
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Hardy-Weinberg Equilibrium 1. 2. 3. 4. 5.
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AlleleFrequency & GenotypeFrequency
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Parents: Genotype freq Allele freq Kids: Genotype freq Allele freq
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Causes of Evolution: Mutation
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Mutations Occur Spontaneously Bacterial colonies never exposed to antibiotics Transfer colonies to 3 dishes containing streptomycin Only streptomycin-resistant colonies grow, in same positions Figure15-1
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Causes of Evolution: Gene Flow
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Causes of Evolution: Genetic Drift
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Population Size& Genetic Drift Largepopulation size Small population size Figure15-2
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Genetic Drift Founder effect Populatio n bottleneck Chance events
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Genetic Bottlenecks Reduce Variability Figure15-3
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Founder Events IncreaseLikelihood of Rare Alleles Figure15-4
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Causes of Evolution: Non-random Mating Non-random mating Figure15-6
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Sexual Selection Figure15-7
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Causes of Evolution: Natural Selection
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Important Points Re: Natural Selection
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