![]() ![]() The chinchilla gene (cch) dilutes color, like the d gene does. Nearly all Jack Russells are homozygous (carry both genes for) C. The dominant C gene allows for full expression of color. (since Liver is unacceptable, and almost unheard of, in JRTs I think we should stick to BB - Jeff has said not to include the rare traits) Jack Russells that are bb have liver (or brown) noses and liver coloring where black should be, whether the terrier is A or at. The dominant B gene produces the black color in terriers that are A or at and gives tan Jack Russells their black noses. The colored patches on the terrier show the true base color of the dog.Īsat - saddle markings carrying tan-point The following information I have found comes from this website:Īlthough Jack Russells are mostly white, the white isn't the base color of the dog - it is actually spotting. The Australian National Kennel Council states that the tan markings can be from the lightest tan to the richest tan (chestnut). ![]() Grizzle is acceptable and should not be confused with brindle. As long as the terrier is predominantly white, moderate body markings are not to be faulted. Unfortunately I don't know much about colour genetics so I'm wondering if anyone with a bit more knowledge is willing to help outĪKC Standard: White, white with black or tan markings, or a combination of these, tri-color. I thought it might be nice to start researching colour in the hope that one day Jeff will get to the Jacks. ![]()
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