NEET Biology question

Statement 1 (Assertion): The maximum frequency of recombination that can result from crossing over between linked genes is 50 percent. Statement 2 (Reason): Linked genes show a higher frequency of crossing over if the distance between them is longer.

(A)Both assertion and reason are true and reason is the correct explanation of assertion
(B)Both assertion and reason are true but reason is not the correct explanation of assertionCorrect
(C)Assertion is true but reason is false
(D)Both assertion and reason are false

Answer: (B)

Solution

It is an established genetic fact that the recombination frequency between any two linked genes never exceeds 50%, since beyond a certain distance, genes behave statistically as if unlinked due to multiple (including double) crossover events cancelling each other out (Statement 1 is true). It is also true that

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Question ID VK-120437