Fig. 1
From: Selection shapes turnover and magnitude of sex-biased expression in Drosophila gonads
Sex-biased gonadal expression in four Drosophila species. a) Schematic diagram of the number of testis-biased, ovary-biased and unbiased genes for each species under study. The number of genes with universal (clade-wide) sex-biased status (SBS) in all four taxa are also shown. b) Using the ingroup taxon D. melanogaster as the reference, the percentage of testis-biased, ovary-biased and unbiased genes (among 10,740 genes) that retained conserved SBS with each step towards the outgroup (D. ananassae) in the phylogeny. The number of genes with conserved testis-biased, ovary-biased and with unbiased status was statistically significantly lower between each step in the phylogeny (for each category between steps Chi2 P < 0.0001)