Assortative mating
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Assortative mating 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 ran
Leaf beetle
Japanese common toad
Fitness (biology)
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Fitness is a quantitative representation of what tends to be favored by natural selection. Fitness can be defined either with respect to a genotype or to a phenotype in a given environment or time. Th
Assortative mating
…own. However, the same result does not apply to females selecting male faces. Genetically related individuals (3rd or 4th cousin level) exhibit higher fitness than unrelated individuals. Assortative mating based on genomic similarities plays a role in human marriages in the United States. Spouses are more…
Herbert Spencer
Darwin's finches by Gould
Selective sweep, frequency vs time