Answer
By transferring the mouse Pax6 gene and switching out the fly eyeless gene, Gehring observed that the eyes developed at different sites on the transgenic flies. He concluded that a gene that controls the development of a mammalian eye can be transplanted to control the development of the insect eye, demonstrating how the "genetic toolkit" remains constant throughout most animal groups.
Work Step by Step
By transferring the mouse Pax6 gene and switching out the fly eyeless gene, Gehring observed that the eyes developed at different sites on the transgenic flies. He concluded that a gene that controls the development of a mammalian eye can be transplanted to control the development of the insect eye, demonstrating how the "genetic toolkit" remains constant throughout most animal groups.