Assertion :- Meiosis involves two sequential cycles of nuclear and cell division called meiosis-I & MeiosisII, but only a single cycle of DNA replication.
Reason:- Meiosis is aimed to produce reduced cells having half number of chromosome than mother cell.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason is False
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that meiosis consists of two sequential cycles of nuclear and cell division, known as meiosis I and meiosis II, and that there is only one cycle of DNA replication.
- This is true because during meiosis, the DNA is replicated once during the S phase of interphase, but the cell undergoes two rounds of division.

2. **Understanding the Reason:**
- The reason given is that meiosis aims to produce reduced cells that have half the number of chromosomes compared to the mother cell.
- This is also true, as meiosis results in the formation of haploid cells (gametes) that contain half the chromosome number of the original diploid cell.

3. **Evaluating the Relationship Between Assertion and Reason:**
- The assertion and reason are both true.
- The reason explains why there is only one cycle of DNA replication during meiosis: it is necessary to reduce the chromosome number in the resulting cells.

4. **Choosing the Correct Option:**
- Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct option is: "Both assertion and reason are true, and reason is the correct explanation of assertion."

**Final Answer:**
- The correct answer is Option 1: Both assertion and reason are true, and reason is the correct explanation of assertion.

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