The chromatids of a chromosome are held together at a point called

Answer

**Step-by-Step Solution:**

1. **Understanding Chromosomes:**
- Chromosomes are structures within cells that contain DNA. They are visible under a microscope during cell division and typically appear as X-shaped structures.

2. **Identifying Sister Chromatids:**
- Each chromosome consists of two identical halves known as sister chromatids. These chromatids are crucial for the proper distribution of genetic material during cell division.

3. **Locating the Connection Point:**
- The sister chromatids are connected at a specific point. This connection is essential for the integrity of the chromosome during the cell cycle.

4. **Naming the Connection Point:**
- The point where the two sister chromatids are held together is called the **centromere**.

5. **Understanding the Role of the Centromere:**
- The centromere is not just a simple connection point; it is a complex structure made up of proteins. It plays a vital role during cell division, particularly in the movement of chromosomes.

6. **Kinetochore Functionality:**
- Associated with the centromere are structures called kinetochores. These are protein complexes that facilitate the attachment of spindle fibers, which pull the chromatids apart during cell division.

7. **Conclusion:**
- Therefore, the chromatids of a chromosome are held together at a point called the **centromere**.

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