Assertion: Number of chromosomes in one genome is equal to number of linkage groups.

Reason: Linkage groups give important information about the location of genes in the chromosomes.

Both assertion and reason are true and reason is the correct explanation of assertion

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Both assertion and reason are true but reason is not the correct explanation of assertion

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Assertion is true but reason is false

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Both assertion and reason are false

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Solution

The correct option is B Both assertion and reason are true but reason is not the correct explanation of assertion
When genes are close together on the same chromosome, they are said to be linked. So the number of chromosomes in one genome is equal to number of linkage groups.
For example - Humans have 24 linkage groups.
Linkage maps give important information about the location of genes in the chromosomes.
A linkage map - genes on a chromosome based on linkage analysis. A linkage map does not show the physical distances between genes but rather their relative locations, as determined by how often two gene loci are inherited together.

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