Figure 2.
Chromosomal distributions of male-biased, female-biased, and unbiased D. melanogaster genes. (A) Old genes that originated before the Sophophora and Drosophila subgenus divergence (Fig. 1, branch 0); (B) recently evolved genes that originated after the D. yakuba/D. erecta split from the D. melanogaster subgroup (Fig. 1, branches 5 and 6).
