mutagen, carcinogen, and teratogen

D​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​efine mutagen, carcinogen, and teratogen. Explain the interaction of gene​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​tic and environmental factors in the pathogenesis of phenylketonuria (PKU)​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​.