Figure 1. D. simulans Heterozygosity (Left) and Divergence (Right) for Genes with and without Gene Expression Divergence.

Divergent gene expression is associated with rapid evolution of protein coding and regulatory regions. There is no relationship between heterozygosity and expression divergence. Points are means with standard error. See Table S2 for sample sizes.

NC, no change; ↑, increase in expression along the D. simulans lineage; ↓, decrease in expression along the D. simulans lineage.