The human gm-csf gene and the mouse gm-csf gene vary by more than 60% in their dna sequence. however, when scientists place the human gene into mice, it functions properly. what best explains why this happens? . a. the difference between genes sequences does not change the structure of the proteins.. b. mice can make human protein without the use of the human gm-csf gene.. c. the mouse dna is a mutated form of the human gm-csf gene.. d. the resulting proteins made by the human gene are similar to the proteins made by the mouse gene..