A chromosome, in which the centromere is situated close to its end so that one arm is very short and other is very long is

Options

A. acrocentric
B. telocentric
C. sub-metacentric
D. metacentric

Answer

To solve the question regarding the type of chromosome where the centromere is situated close to its end, follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Chromosomes**:
- Chromosomes consist of two arms, which are the sections on either side of the centromere. The position of the centromere determines the length of these arms.

2. **Identify the Types of Chromosomes Based on Centromere Position**:
- **Metacentric Chromosome**: The centromere is located in the middle, resulting in two equal-length arms.
- **Submetacentric Chromosome**: The centromere is slightly off-center, leading to one arm being longer than the other, but both are not drastically different in length.
- **Acrocentric Chromosome**: The centromere is located closer to one end, resulting in one very short arm and one very long arm.
- **Telocentric Chromosome**: The centromere is located at the very end of the chromosome, resulting in one arm being absent.

3. **Analyze the Question**:
- The question specifically asks for a chromosome where the centromere is close to the end, creating a very short arm and a very long arm.

4. **Select the Correct Answer**:
- Based on the definitions, the correct answer is **A) Acrocentric chromosome**. This type of chromosome has the centromere positioned near one end, leading to one short arm and one long arm.

5. **Conclusion**:
- Therefore, the answer to the question is **A) Acrocentric**.