Parascaris possesses chromosome

Options

A. Monocentric
B. Dicentric
C. Polycentric
D. Holocentric

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks about the type of chromosomes possessed by Parascaris. We need to identify which of the given options (monocentric, dicentric, polycentric, holocentric) is correct.

2. **Researching Parascaris**: Parascaris is a genus of roundworms. It is important to know the characteristics of its chromosomes to answer the question correctly.

3. **Identifying Chromosome Types**:
- **Monocentric Chromosomes**: These have a single centromere located at one point on the chromosome.
- **Dicentric Chromosomes**: These have two centromeres, which can lead to complications during cell division.
- **Polycentric Chromosomes**: These consist of multiple centromeres. Each segment of the chromosome has its own centromere.
- **Holocentric Chromosomes**: These have centromeres distributed along the entire length of the chromosome.

4. **Analyzing the Information**: According to the video transcript, Parascaris was first studied by Bowery in 1887 and is known to possess polycentric chromosomes. Each polycentric chromosome consists of six segments, with each segment having one centrally located centromere.

5. **Conclusion**: Based on the information gathered, the correct answer is that Parascaris possesses **polycentric chromosomes**.

### Final Answer:
Parascaris possesses polycentric chromosomes.

---