A colour blind man marries a normal woman (without and history of colour blindness in her family). What proportion of their sons will be colour blind?

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family.What is the probablity of their grandson being colour blind ?

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family.What is the probablity of their grandson being colour blind ?

A colourblind man marries a woman with normal sight who was has no history of colour blindness in her family. What is the probability of their sons being colourblind?

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind