Figure 4.

Scatterplots of hybridization intensities from transformed XX;AA and X;AA tissues. Data points correspond to elements reporting autosomal genes (black) and X-chromosome genes (red). (a) XX;AA females transformed into somatic males (dsx^swe/Df(3R)dsx^M+15) compared with germlineless X;AA male progeny of homozygous tud¹mothers and (b) XX;AA ovaries from ovo¹/otu¹⁷females compared with X;AA ovaries from hs-tra⁸³/+ males transformed into females. The expected twofold difference in gene expression in the absence of X-chromosome dosage compensation is shown as a red line.