Q.

What is the distance between the genes of body colour and eye colour on ‘X’ chromosome in Drosophila ?

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a

13 cM

b

1.3 cM

c

37.2 cM

d

38.5 cM

answer is A.

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Detailed Solution

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When a cross was performed between a wild type male and mutant female of Drosophila w.r.t. eye colour and body colour, in the F2 generation 1.3% recombinants were formed. We know that the distance between the genes is equal to the percentage recombinants. Therefore the distance between eye colour and body colour is 1.3 cM.

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What is the distance between the genes of body colour and eye colour on ‘X’ chromosome in Drosophila ?