mention the cause of dna polymorphism??
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There may be several causes of polymorphism: polymorphism can be maintained by a balance between variation created by new mutations and natural selection (see mutational load). genetic variation may be caused by frequency-dependent selection. ... Genetic drift is also a possible source of genetic variation.
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DNA polymorphism can be introduced in a population by mutation and genetic drift. It is a genetic variant that appears in at least 1% of a population.
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