BI266 2009 Section 7: Population Genetics
• Hardy-Weinberg equili brium, which represents no cha nge in allele frequencies in
a population, serves as the foundation for a study of population genetics.
• For Hardy-Weinberg equilibrium to apply there must be no mutation, no
migration, random mating with respect to genotype, no selection, and the
population must be infinitely large.
• The violations of these five assumptions ar e the factors that cau se deviations from
Hardy-Weinberg equilibrium in populations. These factor s fall into five general
categories: mutation, migration, nonrandom mating, selection, and drift.
• It is possibl