Foundations
How Coat Color Genes Interact Across Different Loci
A practical guide to reading several loci together when one gene changes how another gene appears in the coat.
2026-08-26 · Coat Color Inheritance editorial desk
Coat color is rarely the work of one gene. A useful reading starts with the base pigment, then asks whether another locus changes its distribution, intensity, or visibility.
This layered approach helps breeders separate a visible phenotype from the genotype that produced it. It also explains why two dogs that look alike can carry different combinations of alleles.
Use the individual locus guides as references, then record each tested result before making a prediction. A clear table is usually more reliable than a visual guess.