In humans, brown eye color dominates over blue. the mother has blue eyes, and the father is heterozygous

In humans, brown eye color dominates over blue. the mother has blue eyes, and the father is heterozygous for this trait. What is the likelihood of having a blue-eyed baby in this family?

Let the gene for brown eyes be designated as H, and the gene for blue eyes as h.

A mother with blue eyes is necessarily homozygous for the blue-eyed gene – hh, because otherwise this recessive trait could not be realized in her phenotype. This woman is only capable of producing h.

Let us write Hh for a heterozygous father, he will have brown eyes and produce two types of spermatozoa – h and H.

All possible offspring born in a given family will be represented by the following options:

children with a heterozygous genotype and brown eyes (Hh) – 50%;

children with a homozygous genotype and blue eyes (hh) – 50%.

Answer: 50%.