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the linkage map of X -chroosomes of frui...

the linkage map of X -chroosomes of fruitfly has 66 units with yellow body gene (y) at one end and bobbed hair (b) gene at the other end the recomnation frequency between these two genes (y and b) should be :

A

`60%`

B

`gt 50%`

C

`le50%`

D

`100%`

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The correct Answer is:
C
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