In humans, dark hair color (A) dominates over light color (a), six-fingered (B) – over five-fingered (b)

In humans, dark hair color (A) dominates over light color (a), six-fingered (B) – over five-fingered (b). Write down the genotypes of the parents, the possible phenotypes, and the genotypes of the children born from the marriage of a fair-haired five-fingered man to a heterozygous 6-fingered blonde woman.

According to the introduced designations, let us write down the genotype of a fair-haired five-fingered man as aabb, since homozygosity is an indispensable condition for the phenotypic realization of a recessive trait. It produces sperm of the same type ab.

The woman, according to the condition of the problem, has light hair and has 6 fingers on her hand; according to the second characteristic, he is heterozygous – aaBb. Eggs produced by it: aB and ab.

Possible geno- and phenotypic variants of the offspring of the presented pair:

blonde six-toed children (aaBb) – 50%;

fair-haired five-toed children (aabb) – 50%.