In population genetics, the Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or law, states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.
When matings take place between relatives, the pattern is referred to as inbreeding. Inbreeding tends to reduce diversity within populations (but may increase diversity, or at least the variance, among populations). In a complete selfing population, the number of heterozygotes at any given locus decreases.
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