cystic fibrosis occurs in children who have inherited two abnormal copies of a specific gene one from each parent. a parent who does not have cf but has one normal copy of this gene and one abnormal copy is called a cf carrier. a child who receives a normal copy from one parent and an abnormal copy from the other will be a cf carrier and won't have the disease. males and females are equally likely to inherit the disease.
what causes cystic fibrosis?