Select the CORRECT option, for a somatic cell with 2n = 4.

Options

A. `{:(,"No. of chromatids","No. of chromosomes"),(G_1,2,4):}`
B. `{:(,"No.of chromatids","No. of chromosomes"),(G_2,4,4):}`
C. `{:(,"No.of chromatids","No. of chromosomes"),("Prophase",8,4):}`
D. `{:(,"No.of chromatids","No. of chromosomes"),("Metaphase",4,8):}`

Answer

To solve the question regarding a somatic cell with 2n = 4, we need to analyze the different phases of the cell cycle and the relationship between chromosomes and chromatids in each phase.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**:
- The cell cycle consists of two main phases: M phase (mitosis) and interphase (which includes G1, S, and G2 phases).
- In the M phase, the cell divides, while in interphase, the cell prepares for division.

2. **Identifying Chromosome and Chromatid Numbers**:
- A somatic cell with 2n = 4 means it has 4 chromosomes (n = 2, so 2 sets of chromosomes).
- Each chromosome consists of two sister chromatids after DNA replication.

3. **Analyzing Each Phase**:
- **G1 Phase**:
- Chromosome number = 4, Chromatid number = 4 (1 chromatid per chromosome).
- This option is incorrect because the number of chromatids should be 8 (2 chromatids per chromosome).
- **S Phase**:
- Chromosome number remains 4, but the chromatid number doubles to 8 (due to DNA replication).
- **G2 Phase**:
- Chromosome number = 4, Chromatid number = 8 (still after DNA replication).
- **Prophase**:
- Chromosome number = 4, Chromatid number = 8 (chromosomes condense, and DNA replication is complete).
- **Metaphase**:
- Chromosome number = 4, Chromatid number = 8 (chromosomes align at the metaphase plate).

4. **Conclusion**:
- The correct option is **C**: In Prophase, the number of chromosomes is 4 and the number of chromatids is 8.

### Final Answer:
The correct option for a somatic cell with 2n = 4 is **C** (Prophase: 4 chromosomes and 8 chromatids).