The chromosome showing L-shaped structure by the presence of centromere is termed as

Options

A. Acentric
B. Metacentric
C. Sub-metacentric
D. Telocentric

Answer

To answer the question "The chromosome showing L-shaped structure by the presence of centromere is termed as," we will analyze the different types of chromosomes based on the position of the centromere.

### Step-by-Step Solution:

1. **Understanding Chromosome Structure**: Chromosomes can have different shapes based on the position of the centromere, which is the region where the two sister chromatids are joined.

2. **Types of Chromosomes**:
- **Acentric Chromosome**: This type of chromosome lacks a centromere. Therefore, it cannot form any defined shape, including an L-shape.
- **Metacentric Chromosome**: In this type, the centromere is located in the middle of the chromosome, resulting in two equal segments. This typically forms a V-shape, not an L-shape.
- **Submetacentric Chromosome**: This chromosome has the centromere located slightly off-center, leading to two unequal segments. The unequal lengths of these segments cause the chromosome to take on an L-shaped appearance.
- **Telocentric Chromosome**: In this case, the centromere is located at one end of the chromosome, which does not result in an L-shape.

3. **Conclusion**: Based on the definitions and characteristics of these chromosome types, the chromosome that shows an L-shaped structure due to the presence of a centromere is termed as a **submetacentric chromosome**.

### Final Answer:
The chromosome showing an L-shaped structure by the presence of a centromere is termed as **submetacentric chromosome**.