Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Mendel's law of Independent assortment does not hold good for the genes that are located closely on the same chromosome.
Reason (R) : Closely located genes assort independently.
In the light of the above statements, choose the correct answer from the options given below:
- A
Both (A) and (R) are correct and (R) is the correct explanation of (A)
- B
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- C
(A) is correct but (R) is not correct
- D
(A) is not correct but (R) is correct
Genes that lie close together on the same chromosome tend to be inherited together (linkage), so they do not assort independently. Mendel's law of Independent Assortment holds only for genes that are on different chromosomes or far apart on the same chromosome.
Assertion (A) accurately captures this exception to Mendel's second law, so it is correct.
Reason (R) states that closely located genes assort independently, which is the opposite of what actually happens. Closely linked genes show reduced recombination and do not assort independently. So Reason (R) is incorrect.
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