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Biology Chapter 16.2
Term | Definition |
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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. |