BIOL 206 Lecture Notes - Lecture 15: Quantitative Trait Locus, Supergene, Genetic Correlation
9 Mar 2017
School
Department
Course
Professor
Document Summary
1] modes of selection differ in their effect on trait mean and variance. Graph blue: parental generation, red: progeny. Increase in variance (as you get broader over time) These three types of selection are distinguished by the way they vary in mean and variance. Tophat q1 : having looked at the data i just showed you. What mode of selection is evident from these data: directional, stabilizing, disruptive, no selection. This is stabilizing selection bc either extreme causes higher mortality and there is a decrease in variance (you need babies to be neither too small nor too big) 2] genetic correlation between traits complicate responses to selection. Traits are strongly dependent on one another, and correlated in an outstanding number of ways: by a correlation we means if we had a trait x and y, P(x,y) > 0: correlation bc as y increase, x increase (positive association)
