Syndactyly (fused fingers) is inherited as a dominant trait. What is the probability of having children

Syndactyly (fused fingers) is inherited as a dominant trait. What is the probability of having children with fused fingers in a family where both parents are heterozygous for this trait?

Let’s designate the syndactyly gene as A, its healthy allele as a. The genotypes of the parents will be Aa.

Crossing scheme:

R: Aa x Aa – both parents suffer from syndactyly;

G: A, a x A, a – possible gametes;

F: AA – 25% syndactyly;

Aa – 50% syndactyly;

aa – 25% norm.

The probability of having a baby with fused fingers is 75%.