At the end of the G2 phase, the amount of DNA in a diploid cell having the amount of chromosome 2C will be

Options

A. C.
B. 2C.
C. 4C.
D. `C//2.`

Answer

To solve the question regarding the amount of DNA in a diploid cell at the end of the G2 phase, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Cell Cycle**: The cell cycle consists of several phases: G1, S, G2, and M phase. During the interphase (G1, S, and G2), the cell prepares for division.

2. **Identify the Phases**:
- **G1 Phase**: The cell grows and synthesizes proteins. The amount of DNA is 2C (where C represents the basic unit of DNA content).
- **S Phase**: DNA replication occurs during this phase. The amount of DNA doubles, but the chromosome number remains the same. Therefore, after the S phase, the amount of DNA becomes 4C.
- **G2 Phase**: The cell continues to grow and prepare for mitosis, but the DNA amount remains at 4C since no further replication occurs.

3. **Determine the DNA Content at G2 Phase**: Since the amount of DNA was 2C at the end of G1, it becomes 4C after the S phase and remains 4C through the G2 phase.

4. **Conclusion**: At the end of the G2 phase, the amount of DNA in the diploid cell is 4C.

### Final Answer:
The amount of DNA in the diploid cell at the end of the G2 phase is **4C**.

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