This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
RB gene is located on 
Select and explain. 
A. 13q14, B. 14g13, C. 13p14, D. 14p13
A: 13q14
Answer: A: 13q14 
Explanation: Ans. is 'a' 13q14Retinoblastoma is a prime example of a tumour which is associated with loss of heterozygosity.The mutations required to produce retinoblastomas involve the RB genelocated on chromosome 13 q14.