Natural selection. Changing gene frequency. Anthony Allison discovered 30% population of Lake Victoria had sickle cell anaemia. But less than 1% in highlands where normal area.
deme = local population of organisms with similar genes who interbreed and produce offspring..
population genetics is the study of changes in genetic material specifically the changes in frequency of alleles.
microevolution is small scale evolution such as changes in sequence from one generation to the other. macroevolution is large-scale evolution such as speciation that occurs after long period.
Used by david Reich.
Study populations, diseases, genome, risks, changes.