In which chromosome, centromere is situated middle of chromosome and forming two equal arms?

Answer

**Step-by-Step Solution:**

1. **Understanding Chromosome Structure**: Chromosomes are structures within cells that contain DNA. They are typically X-shaped during cell division, consisting of two arms.

2. **Identifying the Centromere**: The centromere is the region of the chromosome where the two sister chromatids are joined. Its position can vary, leading to different classifications of chromosomes.

3. **Classification of Chromosomes**: Chromosomes are classified based on the position of the centromere. The main types are:
- **Metacentric**: Centromere is located in the middle, resulting in two equal arms.
- **Submetacentric**: Centromere is slightly off-center, resulting in one arm being longer than the other.
- **Acrocentric**: Centromere is located closer to one end, creating a very short arm and a long arm.
- **Telocentric**: Centromere is at the very end of the chromosome.

4. **Identifying the Type of Chromosome in the Question**: The question specifically asks for the type of chromosome where the centromere is in the middle, forming two equal arms. This description matches the definition of a **metacentric chromosome**.

5. **Conclusion**: Therefore, the answer to the question is that the centromere is situated in the middle of the chromosome in a **metacentric chromosome**.

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