So now we produce a male because we have an XY and this male will be normal. Why? Well, because that X chromosome will carry that normal color vision given by uppercase blue C. This one will also be male Y and an X. But we're going to have lowercase red C. And so that means this individual will be colorblind just like this color blind parents. So now that we have the pun and square, let's go to A-B-C and Z. And let's begin with A.