This page is a quick reference to show you the possible alleles at each locus. Summary A list of variants and genes affecting coat colors and patterns in dogs: B locus The B locus determines if a dog has black or brown eumelanin. B: Black Eumelanin b*: Brown Eumelanin B > b* D locus The D locus determines if … Continue reading Dog Color Genetics Summary: Genes & Alleles Overview