The ability to speak foreign languages ​​is determined by the dominant gene (A) and sex-linked

The ability to speak foreign languages ​​is determined by the dominant gene (A) and sex-linked, and short fingers are determined by the dominant autosomal gene (B). A woman capable of tongues, whose fingers of normal length marry a man who had great difficulty in English at school and whose fingers were short. The family had a son with normal fingers and showed no ability to speak. a) How many different genotypes can children have in this family? b) What is the probability of having a child capable of languages? c) What is the probability of having a child capable of tongues and with short fingers? d) What is the probability of having a child with the father’s genotype? e) How many different phenotypes can daughters have in this family?

R: Aabb (normal) x aa Bb (unable to short)
G: Ab, ab x ab, ab
F1: AaBb (way, short), aaBb (incapable, short), Aabb (way, norm), aabb (incapable, normal)
answer: 1) 4
2) 50
3) 25%
4) 25%