Question

In mice, black coat colour ( allele B) is dominant to brown coat colour ( allele b). The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to inrerbreed. What percentage of the progeny would have black coats?

Answer 1

All the mice in the first generation mice will have Black coats. Due to the result of the first generation being 100% 'Bb'.
I.E. the black colour is dominant.