Migration, genetic drift

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Soil + Crop Sciences
SOCR 330
Sarah Ward

16 November Using Hardy-Weinberg to Estimate Frequencies in Sex-Linked Traits Red-green color blindness in humans is caused by a recessive X-linked allele Frequency of affected males = q Frequency of affected females = q 2 8% of males are red-green color blind q = 0.08 p = (1 – q) = 0.92 0.64% (q ) of females are color blind 2 pq (2 x 0.92 x 0.08 = 0.147) or 14.7% of females have normal vision but are carriers for color blindness Migration Movement of individuals from one population to another causes gene flow If gene flow occurs between populations with different gene pools, allele frequencies will change Change in allele frequency calculated as Δq = -m (q – q m Where q = original allele
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