A farmer mates a bull that is homozygous dominant for color (BB) and heterozygous curly for coat (Cc) with a cow that is homozygous white for color (bb) and homozygous for a straight coat (cc). What is the percent chance of the offspring having a white curly coat?

Zero %

Explanation:

Male is BBCc and Female is bbcc, then

BBCc x bbCc will always give the B allele in all the F1 generation combinations. That is, all individuals will be coloured, although a half can be straight coat.

If you use a Punnett square, it will be easy to visualize the cross