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
[{'content': 'What is the basis of soing X-chromosome bearing and Y-chromosome bearing sperm? \nSelect and explain. \nA. X-chromosome has 2.8% more DNA, B. Y-chromosome has 2.8% more DNA, C. X-chromosome has 0.28% more DNA, D. Y-chromosome has 0.28% more DNA', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e.,X-chromosome has 2.8% more DNAA sperm-soing technology (the microso method) is the most effective procedure yet devised at separating X-bearing and Y-bearing sperm.X sperm have only 2.8% more DNA than those carrying a Y chromosome, fluorescent dye that attaches to DNA and glows under laser light in sperm soer then separates the sperm, sending X sperm down one tube and Y sperm into another.The soed sperm can then be placed in the woman's uterus (aificial insemination) or used for in vitro feilization.", 'role': 'assistant'}]