Conservation of sex-biased expression of X-linked and autosomal orthologs in A. gambiae and D. melanogaster. The transcription profile of male-, female and non sex-biased A. gambiae genes was compared to their one-to-one D. melanogaster orthologs. The bars show the proportion of A. gambiae sex biased genes with a D. melanogaster ortholog showing either a conserved male (blue), female (pink) or a reversed (light gray) transcription pattern. The proportion of A. gambiae non sex-biased genes with sex-biased D. melanogaster orthologs is also shown (dark grey). Shown is the percentage of such genes according to their location in both A. gambiae (Ag) and D. melanogaster (Dm) on either the autosomes (Auto) or the X chromosome (X).