NEET 2007 Biology question

In maize, hybrid vigour is exploited by:

(1)Inducing mutations.
(2)Bombarding the seeds with DNA.
(3)Crossing of two inbred parental lines.Correct
(4)Harvesting seeds from the most productive plants.

Answer: (3)

Solution

Hybrid vigour (heterosis) is the superiority of the F hybrid over its parents in yield and vigour. In maize, it is exploited commercially by developing pure (inbred) lines by repeated selfing and then crossing two inbred lines to produce hybrid

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Question ID VK-089817