Fig. 3

Distribution of newly recruited genes across the autosomal human chromosomes. A: All the genes assigned to phylostrata 15 through 19 by a majority of the 13 ortholog search engines. B: Those similarly assigned to phylostrata 1 through 13. The data are presented as the ratio of the total number of the genes from the respective phylostratum grouping to the gene content of the whole chromosome (as %), and arranged in order of increasing % gene content. In part A, chromosome 19 is on the extreme right, whereas in part B it is on the extreme left