Gene expression for major chromosome arms. Columns are male-biased (A, D, G), female-biased (B, E, H), or nonsex-differentially expressed (C, F, I). Rows represent comparing testes versus ovaries (A to C), whole adult males versus females (D to F) and gonadectomized males versus gonadectomized females (G to I). The percentage of genes with male, female, or non-biased expression are shown: less than twofold (open), greater than twofold (light), greater than fourfold (dark), and > 10-fold (black). Remaining genes were not reliably detected. Significant deviations (chi-square) are indicated for greater than twofold (**P < 0.0001; *P < 0.005).