L- shaped chromosomes are termed :

Options

A. metacentric
B. acrocentric
C. telocentric
D. submetacentric

Answer

**Step-by-Step Solution:**

1. **Understanding Chromosome Structure**:
- Chromosomes consist of two sister chromatids joined at a central point called the centromere.

2. **Identifying Chromosome Types Based on Centromere Position**:
- The shape of chromosomes can vary depending on the position of the centromere:
- **Metacentric**: Centromere is located in the center, resulting in two arms of equal length.
- **Submetacentric**: Centromere is slightly off-center, leading to one arm being longer than the other. This shape can appear L-shaped or J-shaped during separation.
- **Acrocentric**: Centromere is located closer to one end, resulting in one very short arm and one very long arm.
- **Telocentric**: Centromere is located at the very end of the chromosome, resulting in a rod-like shape.

3. **Identifying the L-Shaped Chromosome**:
- The question specifically asks about L-shaped chromosomes.
- L-shaped chromosomes are characteristic of **submetacentric chromosomes** where the centromere is near the center but not exactly in the middle, causing an unequal arm length.

4. **Conclusion**:
- Therefore, L-shaped chromosomes are termed **submetacentric chromosomes**.

**Final Answer**: L-shaped chromosomes are termed **submetacentric chromosomes**.

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