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': 'Crossing over, true is; \nSelect and explain. \nA. Occurs during diplotene stage, B. Between non sister chromatids of homologous chromosomes, C. Between sister chromatids of homologous chromosomes, D. Between non homologous chromosomes sister chromatids', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Crossing over is the exchange of genetic material between non sister chromatids of homologous chromosomes occuring during pachytene stage of prophase I of meiosis.Recombination of genes in the same chromosome is brought about by crossing over. Ref: PRINCIPLES OF GENETICS, By Eldon John Gardner, Michael J. Simmons, D. Peter Snustad, 8th Edition, Page 163', 'role': 'assistant'}]