Dr. mitchell performs open heart surgery. the incision he makes through the sternal region of his patient divides the thoracic cavity into equal left and right parts. this incision must be made along a:

The incision of the open heart surgery should be along the sternum and typically 6 to 8 inch long.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

2%? i tried finding the exact sorry if it's not 100% correct ; -;