Which of the following sequence is a correct one for a meiotic cell cycle?

Options

A. `G_(1) to S to G_(2) to M to G_(1)`
B. `G_(1) to G_(2) to S to M to G_(2)`
C. `G_(2) to S to G_(1) to M to G_(2)`
D. `S to G_(1) to G_(2) to M to S`

Answer

To determine the correct sequence for a meiotic cell cycle, we need to break down the phases involved in the process. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**: The cell cycle is divided into two main phases: Interphase and M phase (mitotic phase). Interphase is the preparation phase for cell division, while M phase is where the actual cell division occurs.

2. **Phases of Interphase**: Interphase is further divided into three sub-phases:
- **GAP1 (G1)**: This is the first phase where the cell grows and prepares for DNA synthesis. The cell synthesizes proteins, RNA, and other molecules necessary for DNA replication.
- **S Phase**: This is the phase where DNA synthesis occurs. The cell replicates its DNA, resulting in two copies of each chromosome.
- **GAP2 (G2)**: In this phase, the cell continues to grow and prepares for mitosis. It synthesizes organelles and other components needed for cell division.

3. **M Phase**: After interphase, the cell enters the M phase, which consists of:
- **Meiosis I**: The first meiotic division where homologous chromosomes are separated.
- **Meiosis II**: The second meiotic division where sister chromatids are separated.
- **Cytokinesis**: The final step where the cytoplasm divides, resulting in two daughter cells.

4. **Sequence of Events**: The correct sequence for a meiotic cell cycle is:
- Interphase (G1 → S → G2)
- M Phase (Meiosis I → Meiosis II → Cytokinesis)

5. **Conclusion**: The correct sequence for a meiotic cell cycle is:
- Interphase (G1, S, G2) → M Phase (Meiosis I, Meiosis II, Cytokinesis)

### Final Answer:
The correct sequence for a meiotic cell cycle is:
- Interphase (G1, S, G2) → M Phase (Meiosis I, Meiosis II, Cytokinesis)