Problem: The petal color of a flower population is distributed in a bell-shaped normal curve where a few individuals on the left of the curve are white, the individuals in the center of the curve are pink and a few individuals on the right of the curve are yellow. If the white and yellow petal colors increase in frequency in the population while the pink petal color decreases, this would illustrate? Need Assignment Help? Multiple Choice stabilizing selection. disruptive selection. directional selection. genetic drift.