An Array Of Patterns Of Nonrandom Mating

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Species that mate assortatively choose their mate according to their own phenotypic characteristics (Molles Jr. & Cahill Jr., 2014). It is a term used to describe an array of patterns of nonrandom mating (Molles Jr. & Cahill Jr., 2014). It encompasses a correlation, which can be positive or negative, between the male and female phenotypes, similarities or dissimilarities, respectively (Ng & Williams, 2014). Assortative mating has several impacts on the evolution of a species or population. When it is positive it can increase homozygous characteristics, thus decreasing the less favorable intermediate phenotypes and going more towards the phenotypes that increase fitness and survival but can also work to keep the species/population phenotypically the same when it is thriving (Molles Jr. & Cahill Jr., 2014). It also increases speciation, especially sympatric speciation (Molles Jr. & Cahill Jr., 2014). By comparison, negative assortative mating can increase heterozygous characteristics, this is favorable to create a stabilizing evolution for the species (Molles Jr. & Cahill Jr., 2014). Species can choose the way they mate, depending on what is best for the species, and there can be a mixture of the species for the intermediate phenotypes versus the extreme phenotypes (Ng & Williams, 2014). In each of the three studies the species (the convict cichlid fish (Amatitlania siquia), bridge spider (Larinioides sclopetarius), and dioecious mangrove snail (Littoraria ardouiniana))

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