What evidence did scientists use to determine that all 13 species of finches on the Galapagos have one common ancestor?

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)

and i oop

explanation:

the animal that would be cutest if scaled down to the size of a cat? elephant