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Percentage of recombination between A an...

Percentage of recombination between A and B is 9% and C is 17%. B and C is 26%, then the arrangement of genes is

A

ABC

B

ACB

C

BCA

D

BAC

Text Solution

Verified by Experts

The correct Answer is:
D
1 map unit or centimorgan is equivalent to `1 %` recombination between two genes. The frequency of recombination can be used to depict the arrangement of the genes.
Recombination frequency between three genes is
`A-B=9%`
`A-C=17% and`
`B-C=26%`
By manipulating the three possibilities of their arrangements `A-B-C,A-C-B` and `B-A-C` it was found that the three gene must be arranged in the order `B-A-C` with distance between `B-A` being 9 cM and `A - C` being 17 cM and the distance between `B - C` being 26 cM.
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