Question

Heterosis is:

• A. Hybrid incompatibility
• B. Hybrid vigor
• C. Hybrid sterility
• D. Structural hybridity

Answer 1

The correct option is B Hybrid vigor

Heterosis or hybrid vigor is an outbreeding enhancement method which improves or increases the function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents. The progeny of crosses between different varieties of a plant species usually exhibit greater biomass and fertility than either parent. This phenomenon is called heterosis or hybrid vigor.