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37) The genes for mahogany eyes and ebony body are chromosome III in Drosophila. Assume that a mahogany-eyed female was mated
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Answer: C). 25cM

Hint: Non-recombinant progeny are more common in linkage. Hence, recombinant progeny are wild type and both mahogany and ebony.

Recombination frequency (RF)= (no. of recombinant progeny / total progeny)100

Recombinant progeny = 125+125 = 250

RF= (250/1000)100 = 25%

RF(%) = Distance between genes (cM)

Distance between mahogany and ebony genes = 25 cM

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