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Question

Two genes A and B present on same chromosome show 40% recombination, then what will be the percentage of gamete (aB) for the plant having genotype AaBb in cis arrangement?


A
40%
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B
70%
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C
20%
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D
15%
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Solution

The correct option is C 20%
Genotype of plant =AaBb

Number and types of gametes
=(2)n=(2)2=4
AB, Ab, aB, ab. (Ab and aB are recombinant gametes).

Since, recombination =40%
Hence, aB will be =20%
Ab will be =20%

Biology

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