During meiosis, when the paternal and maternal chromosomes brought together and separated respectively?

Options

A. Zygotene & Anaphase-II
B. Prophase-II & Anaphase-I
C. Zygotene & Anaphase-I
D. Leptotene & Telophase-I

Answer

To answer the question regarding when paternal and maternal chromosomes are brought together and separated during meiosis, we can break it down into clear steps:

### Step-by-Step Solution:

1. **Understanding Chromosomes in Meiosis**:
- Meiosis involves two types of chromosomes: paternal (from the father) and maternal (from the mother).

2. **Bringing Together Chromosomes**:
- The process of pairing up homologous chromosomes (one from each parent) occurs during the **zygotin stage** of prophase I. This is when the paternal and maternal chromosomes come together for the purpose of genetic recombination or crossing over.

3. **Separation of Chromosomes**:
- After the crossing over occurs, the homologous chromosomes are separated during **anaphase I** of meiosis. This is the stage where the paired chromosomes (now containing genetic material from both parents due to crossing over) are pulled apart to opposite poles of the cell.

4. **Conclusion**:
- Therefore, the paternal and maternal chromosomes are brought together during the **zygotin stage** and separated during **anaphase I**.

### Final Answer:
The correct answer is: **Zygotin and Anaphase I**.

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