In which type of chromosome, one arms is very long and one arm is very short

Options

A. Acrocentric
B. Metacentric
C. Submetacentric
D. Telo centric

Answer

To determine the type of chromosome in which one arm is very long and the other arm is very short, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromosome Structure**:
- Chromosomes consist of two arms, which are the regions extending from the centromere. The centromere is the constricted region of the chromosome.

2. **Types of Chromosomes**:
- There are four main types of chromosomes based on the position of the centromere:
- **Metacentric**: Centromere is located in the middle, resulting in two arms of equal length.
- **Submetacentric**: Centromere is slightly off-center, leading to one arm being longer than the other, but not extremely different in length.
- **Acrocentric**: Centromere is located near one end, resulting in one very long arm and one very short arm.
- **Telocentric**: Centromere is located at the terminal end, resulting in only one long arm.

3. **Analyzing the Options**:
- **Metacentric**: Both arms are equal. (Not applicable)
- **Submetacentric**: One arm is longer than the other but not extremely. (Not applicable)
- **Acrocentric**: One arm is very long, and the other is very short. (This matches the question)
- **Telocentric**: Only one arm is present, as the centromere is at the end. (Not applicable)

4. **Conclusion**:
- Based on the definitions and characteristics of the different types of chromosomes, the type of chromosome where one arm is very long and the other arm is very short is the **Acrocentric chromosome**.

### Final Answer:
The type of chromosome in which one arm is very long and one arm is very short is **Acrocentric**.

---