AnswWhen the larynx grows larger during puberty, it sticks out at the front of the throat. This is what's called an Adam's apple. Everyone's larynx grows during puberty, but a girl's larynx doesn't grow as much as a boy's does. That's why boys have Adam's apples.
Answer:
a defect in the gene that helps create the enzyme needed to break down phenylalanine.
Explanation:
