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      Question

      The genetic cause(s) of heterosis include:

      A Dominance Correct Answer Incorrect Answer
      B Overdominance Correct Answer Incorrect Answer
      C Epistasis Correct Answer Incorrect Answer
      D All of these Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Heterosis arises fromĀ dominanceĀ (masking deleterious alleles),Ā overdominanceĀ (heterozygote advantage), andĀ epistasisĀ (gene interactions).

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