Which of the following statements is wrong?

Options

A. Chromosomes are well visualized in interphase
B. Duration of cell cycle can vary from organism to organism and also from cell type to cell type
C. M phase represents actual divisional phase or mitosis
D. lnterphase represents the phase between the two successive M phases

Answer

To determine which statement is wrong regarding the cell cycle, we can analyze the phases of the cell cycle, particularly focusing on interphase and mitosis (M phase).

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Interphase includes G1, S, and G2 phases.

2. **Chromatin vs. Chromosomes**: During interphase, the genetic material is in the form of chromatin, which is a less condensed form of DNA. In this state, the chromatin is not easily visible under a light microscope.

3. **Chromosome Formation**: As the cell enters the M phase (mitosis), the chromatin condenses to form distinct chromosomes. This is the stage where chromosomes can be easily visualized.

4. **Analyzing the Statement**: The statement in question claims that "chromosomes are well visualized in interphase." This is incorrect because chromosomes are not well visualized during interphase; instead, chromatin is present.

5. **Conclusion**: Therefore, the wrong statement is that "chromosomes are well visualized in interphase."

### Final Answer:
The wrong statement is: "Chromosomes are well visualized in interphase."

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