Researchers were able to insert the promoter gene for Prx1 (a gene that switches it on) from bats into the mouse genome and the result is that those mice grew significantly longer finger bones than normal mice. Keeping in mind the information from the following question indicate 1) what term might best describe the relationship of the promoter gene for the Prx1 gene in mice vs bats and 2) what might have happened to this gene in bats (make sure that your answers to both questions are clear)?