Figure 3
Histogram of the ratio V g ( i ) /V ip ( i ). (a)The variances V g (i) and V ip (i) and their ratio were computed for each gene i, in the same manner as that adopted in Figure 2. Histogram of the was computed and sampled for all genes i from 280 to 300 generations. σ = .001 (red +), .02 (green x), .03(blue *), .05(pink ▢), and .08(sky blue *) and .1 (black ○). (b) Temporal evolution of the histogram for the ratio V g (i)/V ip (i) for σ = 0.1. The histogram was computed over all networks and for every 20 generations. We used the logarithmic scales for both axes, so that the values for abscissa shows : The histograms over generations 1-20, 21-40, 41-60,101-120, 181-200, and 281-300 were plotted with a different color for each network. With evolution, a peak was formed at V g (i)/V ip (i) = ρ ~ 10-2.3. See Method for the choice of the parameters.