Which group of fish do scientists believe amphibians evolved from?
a. jawless fish
b. cartilaginous fish
c. bony fish
d. lancelets

The correct answer is -

C. bony fish.

The bony fish evolved into two distinct groups, which are Sarcopterygii that contains the lobe-finned fish and Actinopterygii that contains ray-finned fish

The lobe-finned fish further evolved and gave rise to the tetrapods (which are the vertebrates with four limbs), represented by amphibians, reptiles, birds, and mammals.

These lobe-finned fish evolved and developed multi-jointed leg, such as fins with digits, which helped them to crawl along the side of sea.

Thus, they resulted in the evolution of amphibians.

Therefore, option C) Bony fish is the right answer.

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)