A) repulsion
B) recombination
C) linkage
D) crossing over
Correct Answer: C
Solution :
Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to linkage When genes are closely present link together in a group and transmitted as a single unit this phenomenon is called linkage. It was discovered by Morgan. It is an exception of Mendel's principle of independent assortment.
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