This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
Cystic fibrosis is inherited as? 
Select and explain. 
A. AR, B. AD, C. XR, D. XD
A: AR
Answer: A: AR 
Explanation: Ans. is 'a' i.e. AR * Cystic fibrosis is an autosomal recessive disorder of ion transport in epithelial cells that affect fluid secretion in exocrine glands and the epithelial lining of the respiratory, gastrointestinal and reproductive tracts.* Cystic fibrosis occurs due to mutation in the CFTR (Cystic fibrosis transmembrane regulator) gene on long arm of chromosome-7.