Which one of the following is not a part of sexual cycle in fungi ?

Options

A. Formation of dikaryon
B. Fusion of nuclei
C. Formation of conidia
D. Meiosis in zygote

Answer

**Step-by-Step Solution:**

1. **Understanding the Sexual Cycle in Fungi**: The sexual cycle in fungi involves several key processes that lead to the formation of spores and the continuation of the fungal life cycle.

2. **Identifying Key Processes**: The main processes involved in the sexual cycle of fungi are:
- **Plasmogamy**: This is the fusion of the protoplasm of two gametes, resulting in a dikaryotic stage where two nuclei coexist in the same cell.
- **Karyogamy**: This is the fusion of the two nuclei that were formed after plasmogamy, resulting in a diploid zygote.
- **Meiosis**: This occurs in the zygote, leading to the formation of haploid spores.

3. **Analyzing the Options**:
- **Formation of Dikaryon**: This is part of the sexual cycle as it results from plasmogamy.
- **Fusion of Nuclei**: This is part of the sexual cycle as it refers to karyogamy.
- **Formation of Phonidia**: This is not a part of the sexual cycle in fungi. Phonidia refers to a type of asexual reproduction in fungi, not sexual reproduction.
- **Meiosis in Zygote**: This is part of the sexual cycle as it occurs after karyogamy.

4. **Conclusion**: Based on the analysis, the correct answer to the question "Which one of the following is not a part of the sexual cycle in fungi?" is the formation of phonidia.

**Final Answer**: Formation of Phonidia.

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