Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to

(a) repulsion 

(b) recombination 

(c) linkage 

(d) crossing over

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1 Answers

Correct option (c) linkage 

Explanation

TH Morgan (1910) explained the lack of independent assortment in Drosophila due to the linkage. When genes closely present adhere or link together in a group and transmitted as a single unit, the phenomenon is called linkage. It stops the process of independent assortment. Incomplete linkage is broken down due to the crossing over.

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