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Biology Quizlet #18

TermDefinition
sexual selection A form of natural selection in which individuals with certain inherited characteristics are more likely than other individuals to obtain mates.
intersexual selection Selection whereby individuals of one sex (usually females) are choosy in selecting their mates from individuals of the other sex; also called mate choice.
intrasexual selection A direct competition among individuals of one sex (usually the males in vertebrates) for mates of the opposite sex.
genetic drift A change in the allele frequency of a population as a result of chance events rather than natural selection.
bottleneck effect A change in allele frequency following a dramatic reduction in the size of a population
founder effect Genetic drift that occurs when a few individuals become isolated from a larger population and form a new population whose gene pool composition is not reflective of that of the original population.
gene flow Movement of alleles into or out of a population due immigration and emigration
sexual dimorphism Differences in physical characteristics between males and females of the same species.
Created by: rathburn74
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