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Chapter 14 Microevolution in Modern Human Populations

Chapter 14 Microevolution in Modern Human Populations. Human Populations Population Genetics Evolution in Action: Modern Human Populations Human Polymorphisms Human Bicultural Evolution. Population Genetics.

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Chapter 14 Microevolution in Modern Human Populations

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  1. Chapter 14 Microevolution in Modern Human Populations • Human Populations • Population Genetics • Evolution in Action: Modern Human Populations • Human Polymorphisms • Human Bicultural Evolution

  2. Population Genetics • Once a population is identified, can determine if evolutionary forces are operating on the population. • Measure allele frequencies for specific traits and compare them with the Hardy-Weinberg model.

  3. Hardy-Weinberg Equilibrium Evolution is not taking place if: • Population is infinitely large. • No mutation. • No gene flow. • Natural selection is not operating. • Mating is random.

  4. Factors that Initiate Changes in Allele Frequencies • Produce new variation (mutation). • Redistribute variation through gene flow. • Redistribute variation through genetic drift. • Select "advantageous" allele combinations that promote reproductive success (natural selection).

  5. Human Biocultural Evolution Polymorphisms • ABO Blood Group system • Rh system • MN blood group

  6. Human Biocultural Evolution Examples of the interaction of human cultural environments and biology: • Sickle cell disease • Lactose intolerance

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