In humans, the polydactyly allele (6 fingers) dominates the normal five-fingered hand; in a family where one parent has

In humans, the polydactyly allele (6 fingers) dominates the normal five-fingered hand; in a family where one parent has a six-fingered hand and the other has a normal hand structure, a child with a normal hand was born. what are the possible genotypes of the parents?

Six-fingeredness is indicated by the letter A, since this is a dominant sign.
Accordingly, five-fingers are designated by the letter a.
Since one parent is six-fingered, his genotype is (Aa), while the other has a genotype (aa) with normal limbs.
It is worth noting that the first parent (with polydactyly) in this situation cannot have a genotype (AA), otherwise the child would have been born with six fingers.