Explain the inheritance of colour blindness in a marriage of colour blind woman with normal man.

Explanation

When a colour blind woman with two recessive genes marries a normal man among the progenies all the sons are colour blind and all the daughters are normal but carries of this gene is `F_(1)` generation.
If marriage between this `F^(1)` female with a colour blind man takes place among progenies normal visioned carrier daughters and colour blind daughters and males of colour blindness and normall vision will be expected in the `F_(2)` generation