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7 Cards in this Set
- Front
- Back
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Neutral evolution
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evolution via genetic drift
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Adaptive evolution
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evolution via natural selection
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Genetic drift
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process of random fluctuation in allele frequencies
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Neutral alleles
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not affected by selection, for example because they do not affect phenotype
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Selectively advantageous alleles
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fix more quickly and are lost less readily – natural selection pulls their frequency up
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Selectively disadvantageous alleles
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fix more slowly and are more readily lost – natural selection pulls their frequency down
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Theory of founder effect speciation
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drastic reductions in population size promote speciation
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