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Morgan found that the genes pr and vg were closely linked. In a incross of F1...

Morgan found that the genes pr and vg were closely linked. In a incross of F1 in the cis dihybrid configuration for these genes, what phenotypic classes would be in the minority?

A. pr and vg

B. WT and pr vg

C. WT and vg pr and pr vg

D. pr pr and vg vg

*Please show how you found the answer.

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Answer #1

option d is correct

The order of occurrence in minority is : D then c then B then A in high no.

this conclusion is driven by the relation of linkage and crossing over.

when two genes are closely linked then the chances of crossing over or making recombination is very less.

crossing over or recombination is inversely proportional to the linkage.

when linkage is too high then crossing over or recombination chances is very less.

When two genes are present at very much distance then the chances of recombination and crossing over is very high.

Here the statement confirms that the PR and vg genes are present in the closely linked form so they transmit from generation to generation in the same form because they show very less tendency to generate recombinant.

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