Final answer:
Cystic fibrosis is a genetic disease that affects the lungs, liver, pancreas, and intestines. It is caused by a defective gene that produces a faulty protein and leads to the production of thick and sticky mucus in the body. The symptoms include breathing difficulties, chronic lung infections, digestive problems, and immune deficiency.
Step-by-step explanation:
Cystic fibrosis (CF) is a genetic disease that affects the lungs, liver, pancreas, and intestines. It is caused by a defective gene called CFTR, which produces a faulty protein that results in the production of thick and sticky mucus in the body. The symptoms of CF include breathing difficulties, chronic lung infections, digestive problems, and immune deficiency.