This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Malformation of the Female Generative Organs, Subject name: Gynaecology & Obstetrics
The target gene for SRY which favors testis differentiation is: 
Select and explain. 
A. SOX-9 gene, B. RS po 1 gene, C. Dax 1 gene, D. WNT-4 gene
A: SOX-9 gene
Answer: A: SOX-9 gene 
Explanation: Ans. is a, i.e. SOX-9 geneRef: Leon Speroff 8th/ed, p334The target gene for SRY which favours testis differentiation is SOX-9 geneThe genes which favour ovary differentiation are:WnT4Rspo1Dax 1