Figure 1.

Distribution of dN/dS ratios for CT genes and controls. The proportion of genes in each category with ratios in intervals A-I is shown. The categories are: CT-X, CT genes on chromosome X (N = 33); CT-nonX, CT genes not on chromosome X (N = 49); Control-X, control genes on chromosome X (N = 64); Control-nonX, control genes not on chromosome X (N = 71). The intervals are: 0 ≤ A ≤ 0.25; 0.25 < B ≤ 0.5; 0.5 < C ≤ 0.75; 0.75 < D ≤ 1.0; 1.0 < E ≤ 1.25; 1.25 < F ≤ 1.5; 1.5 < G ≤ 1.75; 1.75 < H ≤ 2; 2 < I ≤ 4. Genes which had no synonymous changes (dN/dS denoted '∞' in Table 2) were omitted from the analysis.