Question

What is the genotype and condition of a haemophilic male?

Options

• XᴴXʰ as a carrier

• XʰXʰ with normal clotting

• XᴴY with haemophilia

• XʰY with haemophilia

Answer 1

A haemophilic male has the genotype XʰY, where Xʰ represents the recessive allele for haemophilia. With only one X chromosome carrying the recessive allele and no corresponding allele on the Y chromosome, the recessive trait is fully expressed, resulting in haemophilia.