Home Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 8 PCB Which of the following is incorrect about cr…
Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 8 PCB Single Correct MCQ
Published on: August 12, 2026

Which of the following is incorrect about crossing over?

A
It occurs in the phase during which the four chromatids of each bivalent chromosome become distinct and clearly appear as tetrads.
B
During this, there is an exchange of genetic material between sister chromatids of two homologous chromosomes.
C
This process is mediated by an enzyme called recombinase.
D
It leads to recombination, and by the end of this phase, the chromosomes remain linked at the. sites of crossing over.

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The correct answer is:
B

In pachytene .stage of Meiosis-I during crossing over, there is an exchange of genetic material between non-sister chromatids of two homologous chromosomes.

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