BIOB51H3 Lecture Notes - Lecture 11: Frequency-Dependent Selection, Negative Frequency, Equilibrium Point
Document Summary
Slide 8: rare phenotype advantage when you"re rare in a population, it allows you to have an advantage of whatever the more common phenotype/allele is. Slide 9: as one frequency gets higher, the other ones gets smaller, what is fitness, fitness is lifetime reproductive success, a and b have the same fitness in the middle (stable equilibrium point) Slide 10: allele frequencies will fluctuate around this equilibrium. Slide 11: could be negative frequency dependent maintains diversity. Slide 12: the heterozygote one has a higher frequency than the other homozygotes, this causes the heterozygote to stay at a stable equilibrium for a long time because of selection. Slide 13: the other homozygotes can be of different levels of fitness. Slide 14: (cid:449)orks the other (cid:449)a(cid:455) arou(cid:374)d too. Slide 16: an allele is fixed when its frequency is 1 and lost when its frequency is 0, rate of change depends on dominance relationship and its initial frequency of each allele.
