Two genes for coat colour in dogs have the following alleles - VCE - SSCE Biology - Question 13 - 2012 - Paper 1

In this case, Bb genotype produces black colour because B is dominant over b. The presence of S allows for a solid coat. Thus, Bb Ss would be black with white spotting, not brown. This statement is incorrect.

The Bb genotype can produce a black coat color due to the dominant B allele. However, ss would result in no solid coat color, but instead white spotting. Therefore, Bb ss would not be solid brown, but would have black with white spotting. This statement is incorrect.

With both alleles as bb, the coat color would be brown, not black. The ss genotype means there is white spotting present. Thus, bb ss would not be black but brown with white spots. This statement is incorrect.