Factors that reduce variation within populations genetic drift Quantitatively specific alleles will either be lost or retained : Average number out of 4 alleles retained: original allele frequency before founder event N 0.7, 0.1, 0.1, 0.1 0.94, 0.02, 0.02, 0.02 503.993.6 103.632.0 22.021.23 11.481.12
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