Describe how aphids acquired the ability to change color.

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)

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

condensation. good luck!