Assuming black fur is dominant over brown fur in rabbit, what would the genotype of rabbits that are heterozygous for coat colour?

Q.

In a certain species of animals, black fur (B) is dominant over brown fur (b). Predict the genotype and phenotype of the offspring when both parents are 'Bb' or have heterozygous black fur.

Q. In minks, the gene for brown fur (B) is dominant to the gene for silver fur (b). The parents with brown fur produces offspring with silver fur. The genotype of parents are

Q. The allele for black fur $\left(F^B\right)$ is co-dominant with white fur $\left(F^W\right)$ in mice and when both the alleles are present together, the mice will have black and white spotted fur.
The allele for brown eyes (B) is dominant over blue eyes (b) in mice.
If two mice heterozygous for both traits are crossed, what will be the number of mice showing black and white spotted fur with blue eyes?

Q. Suppose a white-furred rabbit breeds with a black-furred rabbit and all of their offspring have a phenotype of gray fur. What does the gene for fur color in rabbits appear to be an example of?

Q. Black fur in mice (B) is dominant over brown fur (b). short tail (T) are dominant to long tail(t).What fraction of the progency of cross: $BbTt\times BBtt$ will be expected to have black fur with long tail?