This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'Gene responsible for embryogenesis of eye \nSelect and explain. \nA. PAX 6, B. PAX 2, C. PAX 5, D. RAX', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) PAX 6(Ref: Emery genetics)The PAX-6 gene locus is a transcription factor for the various genes and growth factors involved in eye formation. Eye formation in the human embryo begins at approximately 3 weeks into embryonic development and continues through the tenth week.', 'role': 'assistant'}]