Biology / Bio 1765 · Atom · ~20 seconds
Mutation as an Evolutionary Force, Population-Level
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At the population level, mutation is the ultimate source of every new allele, though any single event changes allele frequency only slightly.
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A new mutation in one individual introduces one new allele copy into the population's gene pool for the first time.
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Mutation supplies new alleles slowly — most frequency change still comes from selection, drift, or gene flow on existing variation.