Assortative mating
MATING PATTERN IN WHICH INDIVIDUALS WITH SIMILAR PHENOTYPES (E.G. SIZE, COLOUR) MATE WITH ONE ANOTHER MORE OFTEN
Assortative pairing; Assortive mating; Level Theory
Assortative mating (also referred to as positive assortative mating or homogamy) is a mating pattern and a form of sexual selection in which individuals with similar phenotypes or genotypes mate with one another more frequently than would be expected under a random mating pattern. A majority of the phenotypes that are subject to assortative mating are body size, visual signals (e.