A dikaryophase is most commonly seen in the life history of these fungi

Options

A. Phycomycetes
B. Deuteromycetes
C. Basidiomycetes
D. All the above

Answer

To answer the question, "A dikaryophase is most commonly seen in the life history of these fungi," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Dikaryophase":**
- The dikaryophase refers to a stage in the life cycle of certain fungi where cells contain two distinct nuclei (n + n) that have not yet fused. This phase is significant in the sexual reproduction of fungi.

2. **Identify the Types of Fungi:**
- The options provided are:
- Ficomycitis
- Deuteromycitis
- Bacidiomycitis
- All of the above

3. **Analyze Each Type of Fungi:**
- **Ficomycitis:** This group of fungi does not typically exhibit a dikaryophase in their life cycle.
- **Deuteromycitis:** Also known as imperfect fungi, these fungi reproduce asexually and do not have a defined dikaryophase.
- **Bacidiomycitis:** This group includes mushrooms and other fungi that undergo sexual reproduction involving a dikaryophase. In Bacidiomycitis, the karyogamy (fusion of nuclei) is delayed until just before meiosis, allowing for the presence of two nuclei in the cells.

4. **Conclusion:**
- Based on the analysis, the dikaryophase is most commonly seen in Bacidiomycitis. Therefore, the correct answer to the question is **Bacidiomycitis**.

### Final Answer:
**Bacidiomycitis**