Read the following statements and select the correct statement.
(A) During anaphase, the centromere of each chromosome is towards the pole and their arms trail behind.
(B) The phenomenon of bringing chromosomes at pole is called congression.

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Only A is correct

Only B is correct

Both A and B are correct

Both A and B are incorrect

answer is A.

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Detailed Solution

(A) This statement is correct. During anaphase of mitosis or meiosis II, the sister chromatids of each chromosome separate and move towards opposite poles of the cell. The centromere, the region where the sister chromatids are held together, leads the way, moving toward the pole, while the chromosome arms (chromatid arms) trail behind.

(B) This statement is incorrect. The phenomenon of bringing chromosomes to the metaphase plate (equatorial plane) during metaphase is called congression. During congression, spindle fibers attach to the kinetochores of chromosomes and align them at the metaphase plate, ensuring proper segregation during anaphase.

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