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Question

Heterosis is
  1. Hybrid vigour
  2. Hybrid incompatibility
  3. Hybrid sterility
  4. Structural hybridity

A
Hybrid incompatibility
B
Structural hybridity
C
Hybrid sterility
D
Hybrid vigour
Solution
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Heterosis or hybrid vigor is an outbreeding enhancement device that improves or increased the function of any biological quality in a hybrid offspring. An offspring exhibits heterosis if its traits are enhanced as a result of mixing the genetic contributions of its parents. Thus, the correct answer is option B

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