Not exact matches
On the other hand, two Italian wolves with an unusual, black
coat colour did not show any genetic signatures of hybridisation, except for carrying a dog - derived variant of a
gene linked to
dark colouration.
The
gene for blocking
dark coat color depends on environmental warmth to be activated and expressed.
As long as some
gene on a different chromosome does not interfere, all dogs with the dominant KB allele would be black in those areas of the
coat where «
dark» is called for, such as all over in some breeds or the saddle in other breeds.
Siberian Huskies have a specific
gene that causes a loss of pigmentation in the irises but not the
coat, which is why Huskies can have
dark coats and blue eyes.
The Em variant of the MC1R
gene at the extension (E / e) Locus results in the localized distribution of eumelanin (black pigment) on the muzzle of the dog which resembles a
dark «mask» on dogs with lighter colored
coats.