Biology 1001A Lecture Notes - Lecture 13: Allele Frequency, Genetic Drift, Zygosity

• School: Western University
• Department: Biology
• Course: Biology 1001A
• Professor: Tom Haffie

Document Summary

Let 13: selection, drift, and other disruptions of. Average number of surviving offspring for each genotype is de ned as its absolute. Waa = 20, waa = 15, waa = 12. Divide by absolute tness or most successful genotype to calculate relative tness, w. Most successful genotype (wmax) has w = 1. We tell that selection is happening because not every genotype has the same tness. Most successful genotype will always have an absolute tness of 1, the rest will have an absolute tness less than 1. Whatever has a higher initial allele frequency will increase n frequency until it equals. 1, the lower initial allele frequency will decrease until it becomes extinct. Why such different consequences of heterozygote advantage vs. Common alleles are mostly found in homozygous and rare alleles are found in heterozygote, which tend to increase in frequency.