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Heterosis is also called
Options
(a) mutation
(b) hybrid vigour
(c) variation
(d) hybrid sterility
Correct Answer:
hybrid vigour
Explanation:
Hybrid vigour or heterosis is defined as the superiority of the hybrid over its parents in which expression of characteristics is greater in the heterozygous offspring than homozygous parents. It is lost on inbreeding. It is lost in the F₂ generation in self pollinated plants and declines slowly in cross pollinated plants. So it is more profitable in vegetatively propagated plants as they do not involve sexual reproduction and so hybrid vigour is not lost in subsequent crops. e.g., sweet potato, sugarcane, strawberry and grapes etc. The term was coined by G.H. Shull
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Topics: Enhancement in Food Production
(101)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted
- Vegetative propagation by leaves occurs in
- Intermediate stage between aerobic and anaerobic cycles is
- Banana is seedless (or sedimentary seeds) because it is developed by
- Select important features distinguishing Gnetum from Cycas and Pinus
Topics: Enhancement in Food Production (101)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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