The mutation in cystic fibrosis is on which chromosome ?: (A) 7p, (B) 7q, (C) 5p, (D) 5q
Answer is B. Ans. is 'b' i.e., 7q Cystic fibrosis Cystic fibrosis is an inherited disease of the mucus and sweat glands. Cystic fibrosis follows on autosomal recessive transmission. There is a defect in ion transpo of epithelial cells that affects fluid secretion in i) Exocrine glands (pancreas) ii) Epithelial lining of respiratory, gastrointestinal and reproductive tract.