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': 'Null mutation is \nSelect and explain. \nA. Mutation occuring in Non Coding region, B. Mutation that does not change the amino acid or end product, C. Mutation that codes for a change in progeny without any chromosomal change, D. Mutation that leads to no functional gene product', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Null mutation/loss of function mutation/amorphic mutations:- These mutations are the result of gene product having less or no function. It occurs when the allele has a complete loss of function. Phenotypes associated with such mutations are most often recessive.', 'role': 'assistant'}]