Dikaryophase is commonly seen in members of:

Options

A. Ascomycetes and Phycomycetes.
B. Ascomycetes and Basidiomycetes.
C. Phycomycetes and Basidiomycetes
D. Basidiomycetes and Deuteromycetes.

Answer

To determine which group of fungi commonly exhibits the dikaryophase, we can analyze the options provided and the characteristics of different fungal groups.

### Step-by-Step Solution:

1. **Understand Dikaryophase**:
- The dikaryophase refers to a stage in the life cycle of certain fungi where two nuclei coexist in the same cell. This occurs after plasmogamy (fusion of cytoplasm) but before karyogamy (fusion of nuclei).

2. **Identify Fungal Groups**:
- The question provides four groups of fungi:
- Ascomycetes
- Basidiomycetes
- Phycomycetes
- Deuteromycetes

3. **Analyze Each Group**:
- **Ascomycetes**: Known for having a dikaryotic stage, especially during the formation of their fruiting bodies (ascocarps).
- **Basidiomycetes**: Also exhibit a dikaryotic phase, particularly in the formation of basidiocarps (mushrooms).
- **Phycomycetes**: Typically do not have a dikaryotic stage; karyogamy occurs soon after plasmogamy.
- **Deuteromycetes**: Generally do not exhibit a dikaryotic phase; they reproduce asexually and do not have a defined sexual cycle.

4. **Conclusion**:
- Since both Ascomycetes and Basidiomycetes are characterized by the presence of a dikaryotic phase, the correct answer to the question is that the dikaryophase is commonly seen in members of **Ascomycetes and Basidiomycetes**.

### Final Answer:
The dikaryophase is commonly seen in members of **Ascomycetes and Basidiomycetes**.

---