This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
[{'content': 'The Y chromosome carries a gene on its sho arm that codes for \nSelect and explain. \nA. Testosterone, B. MIF, C. Testes-determining factor (TDF), D. Progesterone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The SRY (sex region Y chromosome) gene present on the sho arm of the Y chromosome codes for TDF (Testes Determining Factor). Presence or absence of this chromosome decides whether the fetus will be male or female. Sex determination is not possible till week 6 i.e. why the embryo is called indeterminate embryo till week 6. External sex differentiation completes after week 11. USG sex determination can be done at this time.', 'role': 'assistant'}]