The primary source of allelic variation is

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(C) The primary source of all genetic variation is $Mutation$. $Mutation$ refers to a sudden, heritable change in the $DNA$ sequence of an organism. W

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Mutation

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(C) The primary source of all genetic variation is $Mutation$. $Mutation$ refers to a sudden, heritable change in the $DNA$ sequence of an organism. While $Independent 	ext{ } assortment$ and $Recombination$ (during meiosis) shuffle existing alleles to create new combinations, they do not create new alleles. $Mutation$ is the ultimate process that introduces entirely new alleles into a population's gene pool, thereby serving as the fundamental source of genetic diversity.

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