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Unformatted text preview: o sexual recombination Natural selection, genetic drift, & gene flow can alter a populations genetic composition o natural selection o genetic drift o bottleneck effect o founder effect o gene flow Natural selection is the primary mechanism of adaptive evolution o genetic variation o variation w/in a pop polymorphism measuring genetic variation o variation betwn pops o closer look at natural selection o evolutionary fitness o directional, disruptive, & stabilizing selection o preservation of genetic variation o diploidy o balancing selection heterozygote advantage frequency-dependent selection o neutral variation o sexual selection o evolutionary enigma of sexual reproduction o why natural selection cannot fashion perfect organisms 1. evolution is ltd by historical constraints 2. adaptations are often compromises 3. chance & natural selection interact 4. selection can edit only existing variations...
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