4 concepts
Genetic Variation
Genetic variation is a measure of the variation that exists in the genetic makeup of individuals within population.
Genetic Drift
Genetic drift is the change in allele frequencies of a population due to random chance events, such as natural disasters.
Gene Flow and Mutation
A population's genetic variation changes as individuals migrate into or out of a population and when mutations introduce new alleles.
Nonrandom Mating and Environmental Variance
Population structure can be altered by nonrandom mating (the preference of certain individuals for mates) as well as the environment.