Typically, cells that no longer undergo mitosis have chromosomes with ___ molecule of DNA and they remain in the ____ subphase of interphase-

Options

A. One, `G_(1)`
B. Two, `G_(2)`
C. One, `G_(2)`
D. Two,S

Answer

To answer the question, we need to identify the characteristics of cells that no longer undergo mitosis. Here’s the step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Mitosis and Cell Cycle**:
- Mitosis is the process of cell division where a single cell divides to produce two identical daughter cells. The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis).

2. **Identifying Cells that No Longer Undergo Mitosis**:
- Cells that no longer undergo mitosis are typically in a resting or non-dividing state. These cells often exit the cell cycle and enter a phase where they do not replicate their DNA or divide.

3. **Chromosome Structure in Non-Dividing Cells**:
- In cells that are not undergoing mitosis, the chromosomes consist of a single molecule of DNA. This is because, during the S phase of the cell cycle, DNA replication occurs, resulting in two identical sister chromatids. If a cell is not dividing, it will not replicate its DNA, thus it will have only one molecule of DNA.

4. **Identifying the Subphase of Interphase**:
- The subphase of interphase where cells that no longer undergo mitosis remain is the G1 phase. In G1, the cell is metabolically active, growing, and performing its functions, but it is not preparing to divide.

5. **Final Answer**:
- Therefore, the answer to the question is: "Typically, cells that no longer undergo mitosis have chromosomes with **one** molecule of DNA and they remain in the **G1** subphase of interphase."

### Summary of the Answer:
- **One** molecule of DNA
- **G1** subphase of interphase