Chapter 9 March of the frequency distribution, p(z)


Figure 9.1 The deterministic march of the frequency distribution. The animation shows the shift in the position of the trait distribution before selection (blue) from generation to generation. Grey ghosts show past positions of the distribution. This animation assumes that additive genetic and phenotypic variance remains constant from generation to generation, as they might under a model in which variation input from mutation and migration is balanced by losses due to selection. In this animation, additive genetic variance = 0.4, phenotypic variance before selection is 1, and s=0.6.