Question

Write the genotypes of the normal parents producing a haemophilic son.

Answer 1

The genotypes of the normal parents producing a haemophilic son are: Father is normal with genotype XY, and mother is a carrier with genotype XX^h (where X^h represents the X chromosome carrying the haemophilia allele). The son inherits the Y chromosome from the father and the X^h chromosome from the mother, resulting in haemophilia. Thus, the father is XY (normal) and the mother is XX^h (carrier).