Question

A woman whose father was a haemophilic marries a normal man. If they have 8
children 4 boys and 4 girls. How many haemophilic would you expect out of them?
Represent in pedigree chart.​

Answer 1

If a carrier female (XHXh) marries a male having normal blood clotting factor (XHY), then the daughters will have genotype XHXH (normal) and XHXh (carrier). All the daughters will have normal clotting of blood but half of them will be carriers. The genotype of the sons will be XHY (normal) and XhY (haemophilic).