Question

Assertion Reduction division occurs in anaphase-I. So there is no need of meiosis.
Reason Meiosis-II occurs to separate homologous chromosomes.

• A. If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
• B. If both Assertion and Reason are true but the Reason is not the correct explanation of Assertion.
• C. If Assertion is true but Reason is false.
• D. If both Assertion and Reason are false

Answer 1

Answer: (D)

Anaphase-I involves separation of homologous chromosomes into different daughter cells. So, meiosis I is a reductional division. But each chromosome is still formed of two sister chromatids joined at the common centromere. Anaphase-I results in reduction in number of chromosomes but each chromosome has double amount of DNA, so, meiosis-II occurs, during, which chromatids of each chromosome separate into different cells. Main aim of meiosis II is to separate genetically modified chromatids of each homologous chromosome formed during crossing over in meiosis-I.