**need asap**

the foxp2 gene encodes a transcription factor associated with vocal learning in mice, bats, birds, and humans. the chimpanzee, gorilla, and rhesus foxp2 proteins are
identical; the human version differs in only 2 of 715 amino acids, a change thought to have contributed to the development of spoken language. in humans, loss-of-function mutations in foxp2 result in severe speech and language disorders. in mice, they hamper brain function and impair vocalizations. mice genetically engineered to carry the human version of foxp2 show changes in their vocal patterns, and more growth and greater adaptability of neurons involved in memory and learning. biologists do not anticipate that a similar experiment in chimpanzees would confer the ability to speak, because spoken language is a complex, epistatic trait (section 13.5). what do you think might happen if their prediction is incorrect?