Non random dating
Non random dating - physiological implications of dating a younger man
Assortative mating in animals has been observed with respect to body size and color.Size-related assortative mating is prevalent across many species of vertebrates and invertebrates.
However, the same result does not apply to females selecting male faces.
Assortative mating with respect to body size can arise as a consequence of intrasexual competition.
In some species, size is correlated with fecundity in females.
Moreover, it is known that larger individuals in such hermaphroditic species produce more eggs, so mutual mate choice is another factor leading to assortative mating in this species.
The second common type of assortative mating occurs with respect to coloration.
Since males are equally invested in the offspring as the mother, both genders are expected to display mate choice, a phenomenon termed as mutual mate choice.
Mutual mate choice occurs when both males and females are searching for a mate that will maximize their fitness.Disassortative mating reduces the genetic similarities within the family.Positive assortative mating occurs more frequently than negative assortative mating.Assortative mating, also referred to as positive assortative mating or homogamy, may increase genetic relatedness within the family.Assortative mating can be contrasted with disassortative mating (also known as negative assortative mating or heterogamy) in which individuals with dissimilar genotypes and/or phenotypes mate with one another more frequently than would be expected under random mating.In other cases, larger females are better equipped to resist male courtship attempts, and only the largest males are able to mate with them.