Table 4.
Expression variation in sex-biased genes
| Two-fold | FDR10% | |||||
|---|---|---|---|---|---|---|
| Sex-bias classification* | Male | Female | Unbiased | Male | Female | Unbiased |
| Number of genes on array | 669 | 768 | 3,891 | 1,228 | 857 | 1,534 |
| Percentage of genes detected as expressed | 61† | 22 | 41 | 67† | 33 | 41 |
| Percentage of expressed genes | ||||||
| Variable in Europe | 20‡ | 12 | 16 | 22† | 13 | 15 |
| Variable in Africa | 28† | 15 | 16 | 27† | 16 | 17 |
| Variable overall | 42† | 32 | 31 | 45† | 31 | 32 |
| Differentially expressed between populations | 1.21§ | 2.86 | 3.54 | 2.46 | 1.75 | 3.10 |
| Average percentage of pairwise differences | ||||||
| Within Europe | 2.50† | 1.14 | 2.07 | 2.93† | 1.50 | 1.82 |
| Within Africa | 3.96† | 1.08 | 1.75 | 3.57† | 1.32 | 1.75 |
| Overall | 3.16† | 1.09 | 2.21 | 3.35† | 1.50 | 2.00 |
*Sex-biased gene sets are defined by Gnad and Parsch [36]. †Significantly different from both female and unbiased (P < 0.05) by Fisher's exact test (percentages) or Mann-Whitney U test (pairwise differences). ‡Significantly different from female (P < 0.05) by Fisher's exact test. §Significantly different from unbiased (P < 0.05) by Fisher's exact test.