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Genetics and Evolution
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Which of the following types of epistatis takes place when one mutation has the opposite effect in the spectre of another mutation?
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A
Sign epistasis
💡 Explanation:
Sign epistasis occurs when one mutation has the opposite effect when in the presence of another mutation. This occurs when a mutation that is deleterious on its own can enhance the effect of a particular beneficial mutation. For example, a large and complex brain is a waste of energy without a range of sense organs, however sense organs can be more useful if the organisms brain is better able to process the information.