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: Medicine
[{'content': 'Dominant trait expresses in:(1994) \nSelect and explain. \nA. Homozygous state, B. Heterozygous state, C. Both homo and heterozygous state, D. Males only', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: bRef: Harrison, 16thed, p. 264', 'role': 'assistant'}]