Question

when a colour blind male marries a normal female , what will be the chances of colour blindness in his grandson ,if his daughter marries to a normal male? ​

Answer 1

Answer:

All sex-linked genes, therefore, pass from male to female and then come back to a male of F$$_{2}$$ generation (grand-children generation). That is there is a chance of 1 in 2 (50% or 0.5) of her grandson being colour blind.