Domestic rabbits vary in the length and colour of their fur. Fig. 6.1 shows a domestic rabbit with short fur and a fur colour pattern called Himalayan. [Figure 6.1] The two genes that determine the length and colour of the fur of this rabbit occur at the A / a locus and the B / bh / b locus. These two gene loci are on separate chromosomes. • The allele A results in short fur. • The allele a results in long fur. • A is dominant to a. • The allele B results in black fur all over the body. • The allele bh results in black fur on the nose, ears, paws and tail of the rabbit, and white fur on the rest of the body (Himalayan pattern). • The allele b results in white fur all over the body (albino). • B is dominant to bh and bh is dominant to b.