If all the sons of a couple are colourblind then

A man, whose father was colourblind, marries a women who had a colourblind mother normal father. What percentage of male children of this couple will be colourblind ?

A man whose father was colourblind marries a woman, who had a colourblind mother and normal father. What percentage of male children of this couple will be colourblind?

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

Colour blindness is a recessive trait. A couple with normal vision has two sons - one colourblind and one with normal vision. If the couple has two daughters, what proportion of them will have normal vision?

A colourblind man marries a normal vision woman whose father was colourblind. They have a first child as a son. What are the chances that a child would be colourblind.

A colourblind man marries a normal vision woman whose father was colourblind. They have a first child as a son. What are the chances that a child would be colourblind.

What percentage of progenies when there is marriage between colourblind father's son and colourblind mother's daughter -

Red - green colour blindness in human beings is goverend by a sex - linked recessive gene. A normal woman whose father was colourblind marries a colourblind man . What proportion of their sons is expected to be colourblind ?

A girl of normal vision whose father was clourblind marries a man of normal vision whose father was also colourblind .their sons would be (o ftotal number of sons)