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Dog colors

Locus E (distribution of eumelanin throughout the body)
DSC017
Allele e H (sable)
MC1R
English cocker spaniel, american cocker spaniel
no-eH, eH
5
The allele e H is responsible for the sable (red) color in English and American Cocker Spaniels.

Dominance order of allele E H at locus E: E M > E G > E> eH > e A > e1–3

In dogs homozygous for this allele, or carrying the second allele, allele "e", the synthesis of eumelanin is partially suppressed, therefore, the color is visually visible as a dark brown.

In some cases, you can observe a gradual transition of colors from golden to brown shades on the head and back of the dog.