random mating

Random mating, in genetics, is a fundamental concept in population genetics. It describes a scenario where individuals in a population mate without any preference for particular genotypes or phenotypes. This means that every individual has an equal chance of mating with any other individual in the population.1

The Hardy-Weinberg law is based on the principle of random mating. This law states that in a large population with random mating, the frequencies of alleles and genotypes will remain constant from one generation to the next, unless acted upon by other evolutionary forces like mutation, selection, or migration. While individual variations arise from random mating, it is nonrandom or selective mating that drives natural selection and evolutionary change. In contrast, assortative mating is a form of nonrandom mating where individuals choose mates based on observable characteristics.12