Assertion :Heterochromatin is genetically inactive.
Reason: It lacks genes.

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 C Assertion is correct but Reason is incorrect
Genetic analyses indicate that heterochromatin is largely genetically inactive. Most of the genes of eukaryotes that have been extensively characterized are located in euchromatic regions of the chromosomes. The earlier belief that no genes are found in heterochromatic regions is not correct, because genes could be located in heterochromatic regions in several cases like Drosophila and tomato. The genes in heterochromatic region perhaps become active for a short period.
So, the correct answer is 'Assertion is correct but Reason is incorrect'.

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