Question

approximately 60% of human genes are also found in fruit flies. about 97.5% of human genes are also found in mice. what does this evidence suggest?
a. humans and mice share a more recent common ancestor than do humans and fruit flies.
b. mice and fruit flies share a more recent common ancestor with each other than with humans.
c. mice have had more mutations and recombinations during their evolution than fruit flies.
d. fruit flies have had more mutations and recombinations during their evolution than mice.
reset
next

Explanation:

The more recent the common ancestor, the more similar the genes. Since humans share more genes with mice (97.5%) than with fruit flies (60%), it implies humans and mice have a more recent common ancestor than humans and fruit flies.

Answer:

A. Humans and mice share a more recent common ancestor than do humans and fruit flies.