Analysis of an ecg can reveal

a. damage to the coronary vessels

b. the sequence of the valvs opening and closing

c. the volume of blood passing through the heart

d. the condition of the conducting system.

e. none of the above

d. the condition of the conducting system.

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)