During meiosis how cycles of nucleus division, DNA replication and division of centromere take place respectively :-

Options

A. Three, Two, One
B. One, Two, Two
C. Two, Two, One
D. Two, One, One

Answer

To answer the question regarding the cycles of nucleus division, DNA replication, and division of centromere during meiosis, we can break it down into steps:

### Step-by-Step Solution:

1. **Nucleus Division**:
- Meiosis consists of two main stages: Meiosis I and Meiosis II.
- In Meiosis I, the nucleus divides for the first time, resulting in two daughter cells.
- In Meiosis II, the nucleus divides again, leading to a total of four daughter cells from the original cell.
- Therefore, the nucleus divides **twice** during meiosis.

2. **DNA Replication**:
- DNA replication occurs during the S phase of the cell cycle, which is part of the interphase before meiosis begins.
- There is only **one** S phase in the entire meiotic process, meaning DNA is replicated only once before the two meiotic divisions.

3. **Division of Centromere**:
- The centromere divides during Meiosis II when the sister chromatids are separated.
- This division occurs only **once** during the entire meiotic process, specifically in Meiosis II.

### Summary of the Answer:
- Nucleus division: **2 times**
- DNA replication: **1 time**
- Division of centromere: **1 time**

Thus, the answer to the question is **2-1-1**.