Question

Heterosis means

• A. Hybrid vigor
• B. Hybrids are weak
• C. Hybrids are weak as well as vigorous
• D. Hybrids are neither weak nor vigorous

Answer 1

The correct option is A Hybrid vigor

Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species exhibit greater biomass, speed of development and fertility than both parents. Various models have been posited to explain heterosis, including dominance, overdominance, and pseudo-overdominance. Heterosis is also called as hybrid vigor or outbreeding enhancement. It is the improved or increased function of any biological quality in a hybrid offspring. Thus, option A is correct.