Fig. 5
A new, comprehensive model for the evolution of dominance. a The relationship between fitness and expression level (arbitrary units). A fitness cost for increasing gene expression is assumed (see the main text). b Predicted h–s relationship when many molecules (orange) and few molecules (blue) are needed. c Predicted h–s relationship when the expression level is high (orange) and low (blue). Note that the patterns predicted in b, c mirror those seen empirically in our analysis
