Figure 3.

The K_a/K_s ratio distribution of young human duplicates. The x axis is the K_a/K_s ratio on the branch leading to one human duplicated gene. The y axis is the number of genes within a K_a/K_s bin. (a) All genes from the 250 pairs, a total of 500 sequences. (b) The fast-evolving duplicate copies of 250 pairs, a total of 250 sequences. (c) The slow-evolving duplicate copies of 250 pairs, a total of 250 sequences.