Phenotypic response to selection for alcohol sensitivity. (a) MET for selection lines. Resistant lines are shown as orange squares, control lines as grey triangles, and sensitive lines as blue circles. Solid lines and shapes represent replicate 1; dashed lines and open shapes denote replicate 2. (b) Regressions of cumulative response on cumulative selection differential for divergence between resistant and sensitive selection lines. The blue line and squares represent replicate 1; the orange line and circles denote replicate 2.