Polycystic kidney disease (PKD) in Bull Terriers is caused b…

Polycystic kidney disease (PKD) in Bull Terriers is caused by a mutation in the PKD1 gene.  The PKD1 gene is on chromosome 6 (an autosome) and PKD is inherited in a dominant fashion. Two bull terriers, both with PKD, had a litter of three pups, one of the pups had PKD, two did not. What were the genotypes of the parents? (D = dominant allele; d = recessive allele)