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: Medicine
[{'content': 'The process underlying differences in expression of a gene, according to which parent has transmitted, is called: \nSelect and explain. \nA. Anticipation, B. Mosaicism, C. Non-penetrance, D. Genomic imprinting', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]