Question by : If two black Labradors with normal vision are mated, and one puppy in a litter of entirely black puppies has P?
A)Both parents are heterozygous for both traits.
B)Both parents are homozygous for both traits.
C)We can’t be certain about the parental genotypes.
D)One parent is heterozygous for PRA, whereas the other does not carry the trait.
E)Both parents are heterozygous carriers of PRA, but we can’t determine whether their coat-color genotype is homozygous or heterozygous.

I think it might be A but i’m not 100% sure

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