Choose the correct statement with respect to dihybrid crosses.

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Tightly linked genes on the same chromosome show very few recombinations.

Tightly linked genes on the same chromosome show higher recombinations.

Genes present far apart on the same chromosome show very few recombinations

Genes loosely linked on the same chromosome show similar recombinations as the tightly linked genes.

answer is A.

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Detailed Solution

Coexistance genes on the same chromosomes is called linkage. More nearer the genes on a chromosome, more tightly they are linked and show fewer recombinations as revealed with the experiments conducted by Morgan on Drosophila. He observed that genes for body color and eye color are closely linked and showed only 1.3% recombinations and genes for eye color and length of wings are loosely linked and showed 37.2% recombinations.

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