Biology / Bio 1641 · Atom · ~20 seconds
Evolution Defined as Change in Allele Frequency
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Evolution, per Unit 1's Bio 0055, is a change in a population's allele frequencies across generations, not a change within any organism's lifetime.
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A population where a beneficial allele's frequency rises across generations has evolved by this definition.
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Seeing a trait's frequency rise across generations does not mean individuals changed mid-life — each one keeps its own genotype.