Dogs’ coat colour is determined by a specific set of genes. The colour of a dog is governed by at least eleven recognised sequence series (A, B, C, D, E, F, G, M, P, S, and T). Every parent of a dog imparts one copy to the offspring. As an illustration, a dog in the B series is innately black or brown. Consider a situation where one parent is homozygous black (BB) and the other is homozygous brown (bb).
All of the progeny in this situation will be heterozygous (Bb).
Because black (B) is dominant, all of the progeny will be this colour. They will, however, have both the B and b alleles. Such heterozygous puppies will result in 25 homozygous black (BB), 15 heterozygous black (Bb), and 25 homozygous brown (bb) offspring if they are crossed.
