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Biology Chapter 16.2

TermDefinition
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.
Created by: DragonT20
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