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Chapter 18.3

Chapter 18.3. Natural Selection Revisited. AP Biology Spring 2011. Natural Selection. Natural Selection may be the most influential microevolutionary process. Natural Selection. An allele that ensures better survival or reproduction will influence the frequency of that allele.

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Chapter 18.3

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  1. Chapter 18.3 Natural Selection Revisited AP Biology Spring 2011

  2. Natural Selection • Natural Selection may be the most influential microevolutionary process

  3. Natural Selection • An allele that ensures better survival or reproduction will influence the frequency of that allele

  4. Natural Selection • Allele frequency can depend on the organisms involved and the selection pressure

  5. Natural Selection • There are three major categories of selection: • Directional • Stabilizing • Disruptive • The next sections will outline each of these categories

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