Question

In pigs, the allele for a wavy, rough coat (R) is dominant to the allele for a soft, fine coat (r). A rough coat boar and a soft coat sow mate. They produce several litters, 50% are rough coat and 50% are smooth coat. What were the genotypes of the parents?

Answer 1

Ok so you should know automatically that neither one can be fully dominant (RR.) If you do Rr and Rr, you get 75% and 25%. You can't have rr on both either. But, if you do Rr and rr you get a 50/50.