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Variation in Populations.pdf

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Commonly, phenotypic<br />

variation has an<br />

underly<strong>in</strong>g genetic basis<br />

but is polygenic with<br />

many genes <strong>in</strong>fluenc<strong>in</strong>g<br />

the phenotype.<br />

<strong>Variation</strong> that has an<br />

underly<strong>in</strong>g genetic basis<br />

is important<br />

evolutionarily. The<br />

frequency of different<br />

forms of a gene can<br />

change.

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