Answer to Question #145480 in Genetics for Vaith

Question

 Classical haemophilia is inherited as recessive X-linked disease. Man with haemophilia marries homozygous healthy woman. In this family were born healthy daughter and son. What is the probability of birth of the sick children in this family?

Answer 1

a-haemophilia allele

A-healthy allele

P: X^aY + X^AX^A

F1: X^AY, X^AY, X^AX^a , X^AX^a

All children will be healthy