Question

A colurblind child is born to a couple with normal vision. Workout a cross to show how it is possible? Mention
the sex of the child.​

Answer 1

X Y X ^ c X * X ^ c X ^ c * Y XX |XY X

The progenies with the as follows: X * X ^ c -carrier female X ^ c * Y - colour blind Male XX-normal female XY-normal Male Thus, we see that even when both parents are normal one of the children is colour blind.

The sex of the colour-blind child is male.