Fig. 1

Representative photos of the (left) agouti (zero copies of the melanism causing MC1R-Δ24 mutant allele), (centre) intermediate (one copy of the MC1R-Δ24 mutant allele), and (right) black (two copies of the MC1R-Δ24 mutant allele) eastern grey squirrel (Sciurus carolinensis) coat colour phenotypes