Other name of primary constriction is

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of a Chromosome**:
- A chromosome consists of two arms and a constricted region. The arms are the long parts of the chromosome, while the constricted region is where the two chromatids are joined.

2. **Identifying the Primary Constriction**:
- The primary constriction is a specific part of the chromosome where the two chromatids are attached. This region is crucial for the proper segregation of chromosomes during cell division.

3. **Naming the Primary Constriction**:
- The primary constriction is commonly referred to as the centromere. It is the narrow area that plays a vital role in the movement of chromosomes during cell division.

4. **Defining the Centromere**:
- The centromere is defined as the narrow area at which two chromatids are attached to each other. This attachment is essential for the chromosome's stability and function during cell division.

5. **Conclusion**:
- Therefore, the other name for the primary constriction is the centromere.

**Final Answer**: The other name of primary constriction is the centromere.

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