The condensation of chromatin into dense chromosomes takes place during ___I___ while chromosomes uncoil to form thread-like chromatin during _____II______ .

Options

A. I-telophase, II-metaphase
B. I-metaphase, II-anaphase
C. I-anaphase, II-prophase
D. I-prophase, II-telophase

Answer

To answer the question regarding the stages of chromatin condensation and uncoiling, we can break down the process as follows:

### Step-by-Step Solution:

1. **Understanding Chromatin and Chromosomes**:
- Chromatin is a complex of DNA and protein found in the nucleus of eukaryotic cells. During cell division, chromatin condenses to form visible chromosomes.

2. **Identifying the Phase of Condensation**:
- The condensation of chromatin into dense chromosomes occurs during a specific phase of the cell cycle. This process begins in the **prophase** of mitosis, where chromatin fibers become tightly packed, forming distinct chromosomes.

3. **Identifying the Phase of Uncoiling**:
- After the chromosomes have been separated and moved to opposite poles of the cell, they begin to uncoil back into chromatin. This uncoiling occurs during the **telophase** of mitosis, where the nuclear envelope re-forms around each set of chromosomes, and the chromosomes begin to de-condense back into chromatin.

4. **Final Answers**:
- Therefore, the answers to the blanks in the question are:
- **I**: Prophase
- **II**: Telophase

### Complete Answer:
The condensation of chromatin into dense chromosomes takes place during **prophase** while chromosomes uncoil to form thread-like chromatin during **telophase**.

---