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Question
Assertion :In most of the higher organisms, the formation of one chiasm reduces the probability of another chiasm forming in an immediately adjacent region of the chromosome. Reason: Once the parts of the chromatids are exchanged, they cannot rejoin the original strand at any other position.
Assertion :In most of the higher organisms, the formation of one chiasm reduces the probability of another chiasm forming in an immediately adjacent region of the chromosome. Reason: Once the parts of the chromatids are exchanged, they cannot rejoin the original strand at any other position.
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
During crossingover non sister chromatid of homologous chromosome exchange their parts and form chiasma.formation of one chiasma cause repulsion between other non sister chromatid of same chromosome. so both assertion and reason are correct but reason is not correct explanation for assertion . So option B is correct.
During crossingover non sister chromatid of homologous chromosome exchange their parts and form chiasma.formation of one chiasma cause repulsion between other non sister chromatid of same chromosome. so both assertion and reason are correct but reason is not correct explanation for assertion .
So option B is correct.
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