How many chromosomes will the cell have at `G_1` after S and after Mitotic phase respectively?

Options

A. 14, 14,7
B. 14, 14, 14
C. 7,7,7
D. 7, 14, 14

Explanation

To solve the question regarding the number of chromosomes in a cell at different phases of the cell cycle (G1, S, and mitotic phase), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Cell Cycle Phases**:
- The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitotic phase).
- In G1, the cell is preparing for DNA synthesis.
- In S phase, DNA is replicated.
- In G2, the cell prepares for mitosis.
- In the M phase, the cell divides.

2. **Chromosome Count in G1 Phase**:
- In the G1 phase, the cell has a certain number of chromosomes. For this example, let's assume the cell has **14 chromosomes** in the G1 phase.

3. **Chromosome Count in S Phase**:
- During the S phase, the DNA is replicated, but the number of chromosomes remains the same because each chromosome is duplicated into two sister chromatids. Therefore, the number of chromosomes is still **14**.

4. **Chromosome Count in Mitotic Phase**:
- At the end of the S phase, the cell enters the G2 phase and then the mitotic phase. During mitosis, the sister chromatids are separated into two daughter cells. However, the total number of chromosomes remains **14** in each daughter cell after mitosis.

5. **Final Counts**:
- G1 Phase: 14 chromosomes
- S Phase: 14 chromosomes
- Mitotic Phase: 14 chromosomes

### Conclusion:
The number of chromosomes in the cell at G1, after S, and after the mitotic phase is **14, 14, 14** respectively.