| Hypothesis | Mean dN/dS | dN/dS > 1 | Heterozygosity |
---|---|---|---|---|
Demography (assuming no selection) | Higher N e in Gallus | Lower in Gallus | Higher in Gallus | Higher in Gallus |
 | Lower N e in Gallus | Higher in Gallus | Lower in Gallus | Lower in Gallus |
Selection (assuming equal Ne) | Directional selection on Gallus | Higher in Gallus | Elevated for a proportion of genes in Gallus | Equal between species |
 | Sexual Selection on Gallus | Higher in Gallus | Elevated for a proportion of genes in Gallus | Lower in Gallus (due to reduced male population size) |