A mutation in the Melanocortin 1 Receptor (MC1R) gene causes a black (melanistic) mask.
Only one copy of this mutation (Em) is required to produce the melanistic mask.
Afghan Hound |
Akita |
American Cocker Spaniel |
American Staffordshire Terrier |
Boxer |
Briard |
Bull Mastiff |
Cairn Terrier |
Cardigan Welsh Corgi |
Chihuahua |
Chinese Shar-pei |
Chinook |
Dutch Shepherd |
English Bulldog |
German Shepherd Dog |
Great Dane |
Greyhound |
Groenendael |
Italian Greyhound |
Laekenois |
Malinois |
Pekingese |
Pug |
Saint Bernard |
Saluki |
Staffordshire Bull Terrier |
Tervuren |
Whippet |
Wirehaired Pointing Griffon |