SOCR 330 Lecture Notes - Gamete, Allele Frequency
Document Summary
Using hardy-weinberg to estimate frequencies in sex-linked traits. Red-green color blindness in humans is caused by a recessive x-linked allele. 8% of males are red-green color blind q = 0. 08 p = (1 q) = 0. 92. 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. 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. Where q = original allele frequency qm = allele frequency among arriving migrants m = rate of migration (proportion by which migrants increases population) Population a 100 bears: frequency of cinnamon gene q = 0. 1. Population b: frequency of cinnamon gene qm = 0. 3. Change in allele frequency due to random gamete sampling. Can have major effect on gene pool in small populations (<100) Probability of allele being fixed is same as initial frequency.
