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Question

Statement A: For a particular character in an individual, each gamete gets only one allele.
Statement B: Chromatids of a chromosome split (separate) and move towards opposite poles during anaphase of mitosis.

A
Both the statements are correct and B is the reason for A.
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B
Both the statements are correct and B is not the reason for A.
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C
Statement A is correct and statement B is wrong.
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D
Statement B is correct and statement A is wrong.
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Solution

The correct option is B Both the statements are correct and B is not the reason for A.
  • The gametes are produced by meiotic division. In meiosis 1, there is duplication and separation of the chromosomes in two cells. In meiosis II, there is a separation of the chromatids from the chromosomes and then the distribution occurs in the cells. There are four haploid gametes produced from one parent cell. The parent cell has two alleles for each gene. Each gamete contains only one allele from the parent.
  • During the anaphase, the chromatids which are formed after the duplication of the chromosomes gets separated. There is the breaking of the chromosomes from the centromere. This is called as the chromosome split. These separated chromosomes then migrate to the opposite poles.
Both the assertion and reason are correct, but the reason is not correct explanation for the assertion.
Thus, the correct answer is option B.

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