___ is the best stage to count the number and study the morphology of chromosomes.

Options

A. Prophase
B. metaphase
C. Anaphase
D. Telophase

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the stage in the cell cycle that is best suited for counting the number of chromosomes and studying their morphology.

2. **Identifying the Relevant Phase**: The cell cycle includes several phases, particularly during the M phase (mitotic phase), which consists of prophase, metaphase, anaphase, and telophase.

3. **Analyzing Each Phase**:
- **Prophase**: In this phase, chromosomes begin to condense and become visible, but they are not yet aligned or fully formed, making it difficult to accurately count and study their morphology.
- **Metaphase**: During metaphase, chromosomes are fully condensed, aligned at the metaphase plate, and are at their most distinct size and shape. This makes it the optimal stage for counting and studying the morphology of chromosomes.
- **Anaphase**: In anaphase, chromosomes are being pulled apart, which can lead to confusion in counting as they are no longer in their paired form.
- **Telophase**: In telophase, chromosomes begin to de-condense and are not easily observable, making it less suitable for counting and studying morphology.

4. **Conclusion**: Based on the analysis, metaphase is the best stage to count the number of chromosomes and study their morphology.

5. **Final Answer**: The best stage to count the number and study the morphology of chromosomes is **metaphase**.

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