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Genetic Bottleneck Effect Caused Severe Reduction Population Size

The bottleneck effect is caused by a severe reduction in population size (e.g. due to a natural disaster). By randomness alone, certain alleles may be overrepresented, underrepresented, or altogether eliminated among the survivors. This makes the effects of genetic drift more pronounced, and often reduces levels of genetic variation for long periods of time.

L'effetto collo di bottiglia è causato da una grave riduzione delle dimensioni della popolazione (ad esempio, a causa di un disastro naturale). Per pura casualità, determinati alleli possono essere sovrarappresentati, sottorappresentati o del tutto eliminati tra i sopravvissuti. Ciò rende gli effetti della deriva genetica più pronunciat i, e spesso riduce i livelli di variazione genetica per lunghi periodi di tempo.

Text The bottleneck effect is caused by a severe reduction in population size (e.g. due to a natural disaster).  By randomness alone, certain alleles may be overrepresented, underrepresented, or altogether eliminated among the survivors.  This makes the effects of genetic drift more pronounced, and often reduces levels of genetic variation for long periods of time.

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