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Assertion: During anaphase, centromere of each chromosome splites and chromatids separate. Reason: During anaphase, chromatids move to opposte poles.A. If both assertion and reason are true and reason is the correct explantion of assertionB. If both assertion and reason are true but reason is not the correct explnantion of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.

Answer» Correct Answer - B
In anaphase, chormosomes are arranged on the equatorial plate for a short period. In anaphase centromeres of chormosomes start to divide into two, forming daughter chromatids with centromere in each. Daughter chromosomes are repulsive so, migrate towards opposite poles. Spindle fibres attached to the centromeres shorten and pull the chromosomes to the poles. In anaphasic movement of chormosomes, the centromeres lead the path while the limbs trail behind. So anaphasic chromosomes appear as V-,L-,J- and I-shaped.


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