An activator that is responsive to an inhibitor:
a. is under negative control
b. is in it's active state until the inhibitor is present
c. has an allosteric site
d. all of the above are correct
e. two of the above are correct

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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)

answer; i believe the correct answer is (replication is not conservative);