According to Hardy Weinberg Principle, the gene or allele frequencies in a population will remain stable from generation to generation until acted on by an outside force.
Allele frequencies in a population will not change from generation to generation, as far as factors of evolution such as natural selection, mutation, and migration are not taking place.
Hardy-Weinberg equilibrium can be disturbed by the forces of evolution which includes, mutations, natural selection, gene flow, non-random mating and genetic drift.
