Allowed colors are red, sesame (a red with
recessive black gene that manifests itself as a sooty overlay), and black and tan.
Although, recent studies have shown that even with the
dominant black gene present the brindle still appears.
The brindle gene is a recessive part of the K series / K Locus of genes which is dominantly black, recessive brindle and recessive
non-solid black genes.
Dominant black genes usually stop the development of brindle, but the following recessive color genes can produce different variations of the brindle colors.
In the instances where some alleles at the E locus refuse to
allow black genes to be expressed, you can get tan expressed in its place: think some Chessies, Chows, Danes, and others.
Your house cat at home may be what is referred to as a «dilute tortie» making her a good example of how the D class genes lighten the dominant orange and
black genes creating a soft cream and gray (blue) coat with a tortoiseshell pattern.»
A German Shepherd that is, say, black and tan, can carry the recessive
solid black gene and produce Black German Shepherd puppies.
«The Russian Blue breed is a great example of these phenomena, where the attractive blue coat this breed sports is caused by dilute expression of the
dominant black gene.
Usually, German Shepherds are a brown and black mix, but some carry the
recessive black gene and end up giving birth to a Black German Shepherd.
In the case of calicos, one X has
the black gene and the other has the orange gene.
It's hard to prove for sure, but it's possible that their recessive genes that carry
the black gene may also contribute to a larger size.
The black gene mutation is only known to occur in the Syrians and Campbell's.
The Blue Merle coat color is created by one
Black gene and one Merle gene.
Although the kitten of a black might not appear to be black, he carries
the black gene.
There are probably two main reasons for this: 1)
the black gene is dominant so therefore there are more black dogs.
Solid black German Shepherds only carry
the black gene.
In order for a litter to produce black puppies both the sire and dam must carry
the black gene.
Since chocolate Labs will not carry
the black gene, they can not produce black puppies.