Where does the nadh take the high-energy electrons

Within cellular respiration, high vitality electrons high vitality electrons are expelled from a natural atom (glucose) and conveyed by coenzymes called NAD and FAD changing to NADH and FADH2. NADH and FADH2  are full carriers, they are carrying two high-energy electrons

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

looks like the answer is     c     to me!