Genetic drift

Genetic drift

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  GENETIC DRIFT CHITHRA S EVOLUTION CSIRNET
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  What is GeneticDrift?  Genetic drift is a mechanism of evolution responsible for random changes in a gene pool  Genetic drift is the change in frequencies of alleles in a population due to chance  Happens to all population  But its effects tend to be stronger in small populations  Genetic drift tends to reduce genetic variation through losses of alleles
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   Genetic driftmay result in the loss of some alleles (including beneficial ones) and the fixation of other alleles. That means, a beneficial allele may be lost, or a slightly harmful allele may become fixed, purely by chance
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  Two Types ofGenetic Drift Genetic Drift Bottle Neck Effect (Disaster) Founder Effect (Migration and new colony formation)
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