a covalent bond is A, formed the transfer of electrons from one atom to another B. an attraction of charged atoms C. a type of bond that results in iconic compounds D. a sharing of electrons between two atoms E. a sharing of protons between two atoms

Explanation:

the correct answer is D sharing of electrons between two atoms

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)

i believe the answer would be b. hope it : )