Q.

Given below are two statements : 
Statement I : Each pole receives half the number of chromosomes in anaphase II in comparison to Anaphase I during meiosis.
Statement II : Centromere divides in anaphase during mitosis.
In the light of the above statements, choose the correct answer from the options given below :

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a

Both Statement I and Statement II are true 

b

Statement I is false but Statement II is true 

c

Statement I is true but Statement II is false  

d

Both Statement I and Statement II are false

answer is B.

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Detailed Solution

Statement I is false. In Anaphase I of meiosis, homologous chromosomes separate and move to opposite poles, resulting in each daughter cell receiving one homologous chromosome from each pair. In Anaphase II, sister chromatids separate and move to opposite poles, resulting in each daughter cell receiving one chromatid from each homologous chromosome. Thus, the number of chromosomes at each pole in Anaphase I is half.

Statement II is true. In anaphase, during mitosis, the sister chromatids separate, and each chromatid becomes an individual chromosome. The centromere divides, allowing the sister chromatids to move to opposite poles of the cell. This division of the centromere ensures that each daughter cell receives the correct number of chromosomes.

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