Plot of ( V
( i ), V
( i )) over all genes, after 200 generations, computed in the same manner as that described in Figure 2. Instead of a single mutation per network adopted thus far, we used much a larger number of mutations. Each color represented the variances as a result of 20, 75, 100, and 140 mutations per network, which gave additions or deletions of paths chosen randomly in the gene regulation network (GRN). After mutation number ~ 100, many of genes touched the line V
(i) = V
(i), where error catastrophe was percolated over many genes.