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: Biochemistry
Sex determining region is located on ? 
Select and explain. 
A. Long arm of Y chromosome, B. Sho arm of Y chromosome, C. Long arm of X chromosome, D. Sho arm of X chromosome
B: Sho arm of Y chromosome
Answer: B: Sho arm of Y chromosome 
Explanation: Product of SRY gene is sex-determining region Y protein. This protein is involved in male sexual development.