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
Genes for sex determination is: 
Select and explain. 
A. Shh, B. SRY, C. AZF, D. HOX
B: SRY
Answer: B: SRY 
Explanation: The SRY gene provides instructions for making a protein called the sex-determining region Y protein. 
This protein is involved in male sexual development, which is usually determined by the chromosomes an individual has.