Chromosome map is useful for

Finding exact location of gene on chromosome

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Knowing combination of various genes in a linkage group of chromosomes

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Predicting results of dihybrid and trihybrid crosses

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All of the above

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Solution

The correct option is D All of the above
Chromosome map is a linear representation of the genes and relative distances of the these genes in a chromosome. It is also called as genetic map. In this, markers such as microsatellite are mapped on the chromosome. It is used to identify the exact location of gene and distance between genes on chromosome. The percentage of crossing over between two genes is directly proportional to their distance. Hence, by knowing the distance between two genes, recombination of various genes in a linkage group can be known. Also, results of crosses can be predicted by knowing the percentage of linkage.
Thus, the correct answer is option D.

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