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  4. Mendel's law of independent assortment does not hold true for the genes that are located closely on

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Q. Mendel's law of independent assortment does not hold true for the genes that are located closely on

Principles of Inheritance and Variation

Solution:

As per linkage experiments carried out by Morgan, the two linked genes do not always segregate independently of each other and $F_2$ ratio deviated very significantly from $9:3:3:1$ ratio (expected when two genes are independent). Hence, if linkage was known at the time of Mendel, he would not have been able to explain law of independent assortment.