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Biology Ch 16.2
Ch.16 vocab
Term | Definition |
---|---|
immigration | the movement of an individual or group into an area |
emigration | the movement of an individual or group out of an area |
gene flow | the movement of genes into or out of a population due to interbreeding |
genetic drift | the random change in allele frequency in a population |
sexual selection | an evolutionary mechanism by which traits that increase the ability of individuals to attract or acquire mates appear with increasing frequency in a population; selection in which a mate is chosen on the basis of a particular trait or traits |
stabilizing selection | a type of natural selection in which the average form of a trait is favored and becomes more common |
disruptive selection | a type of natural selection in which two extreme forms of a trait are selected |
directional selection | a type of natural selection in which the most extreme form of a trait is favored and becomes more common |