Assertion :Phenotypic superiority of hybrid over either of its parents in one or more traits is termed hybrid vigour. Reason: Suppression of expression of recessive harmful genes occurs in heterozygotes.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Hybrid vigour is the ability of the hybrid individual to express superior traits in comparison to the parents.
Suppression of the harmful trait is by introducing a dominant trait by cross-breeding.
In that case, the heterozygotes suppress the expression of the harmful recessive traits.
So, the correct option is
'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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