1. Chapter 14 Microevolution in Modern 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