What life-threatening genetic disorder is characterized by abnormally thick mucus in the lungs and pancreas?

Cystic fibrosis is a life-threatening genetic disorder primarily caused by mutations in the CFTR gene. This condition leads to the production of thick and sticky mucus, particularly affecting the lungs and digestive system, including the pancreas. The resulting mucus buildup in the lungs can cause serious respiratory issues, leading to infections and difficulty breathing. In the pancreas, the thickened mucus can obstruct the flow of digestive enzymes, which are crucial for nutrient absorption.

This disorder exemplifies a specific type of genetic inheritance, and its symptoms can greatly impact a patient’s quality of life and longevity if not managed properly. Other options like hemophilia, Down syndrome, and Fragile X syndrome involve different genetic mechanisms and symptoms that do not primarily revolve around the abnormal mucous production seen in cystic fibrosis. Thus, cystic fibrosis is correctly identified as the life-threatening genetic disorder associated with these characteristics.