Proportion of colour blind children when normal man marries a carrier woman is?

Q. A colour blind man marries a normal woman whose father was colour blind. What percentage of children is expected to be colour blind?

Q. A normal woman is married to a colour blind man. The children are excepted to be.

Q. A man whose father was colour blind marries a woman who had colour blind mother and normal father. What percentage of male children of this couple will be colour blind.

Q. A woman with normal vision marries a man with normal vision and gives birth to a colour blind son. Her husband dies and she marries a colour blind man. What is the probability of her children having the abnormality?

Q. If a normal woman marries a colour blind man then