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

To determine which option is not a part of the sexual cycle in fungi, let's analyze the components of the sexual cycle:

1. **Understanding the Sexual Cycle in Fungi**:
- The sexual cycle in fungi consists of three main stages:
- **Plasmogamy**: This is the fusion of the cytoplasm of two gametes, which can be motile or non-motile.
- **Karyogamy**: This is the fusion of the nuclei from the two gametes after plasmogamy has occurred.
- **Meiosis**: This is the process of reduction division where the diploid (2n) nucleus undergoes meiosis to produce haploid (n) spores.

2. **Analyzing the Options**:
- **Formation of Dicharone**: This refers to the dikaryotic stage where two nuclei coexist in a single cell after plasmogamy but before karyogamy. This is part of the sexual cycle.
- **Fusion of Nuclei**: This is karyogamy, which is a crucial step in the sexual cycle.
- **Formation of Conidia**: Conidia are asexual spores produced by fungi, not part of the sexual cycle.
- **Meiosis**: This is a part of the sexual cycle, as it leads to the formation of haploid spores.

3. **Conclusion**:
- The option that is not a part of the sexual cycle in fungi is **Formation of Conidia**.

Thus, the correct answer is **C: Formation of Conidia**.