In Agaricus the largest phase of nuclear condition is

Options

A. n
B. 2n
C. `n + n`
D. 3n

Answer

To answer the question regarding the largest phase of nuclear condition in Agaricus, we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding Agaricus**:
- Agaricus is a genus of mushrooms, commonly known for species like Agaricus bisporus (the common button mushroom).

2. **Life Cycle of Agaricus**:
- The life cycle of Agaricus includes a vegetative phase primarily consisting of mycelium, which is a network of filamentous structures called hyphae.

3. **Nuclear Conditions**:
- In fungi, the nuclear condition can vary. The key terms to understand here are haploid (n), diploid (2n), and dikaryotic (n + n).

4. **Dikaryotic Phase**:
- In Agaricus, the dikaryotic phase occurs when two compatible hyphae from different mating types (plus and minus strains) come into contact. This process is known as somatogamy.

5. **Formation of Dikaryotic Cells**:
- During somatogamy, the nuclei from the two hyphae fuse, but instead of forming a diploid cell immediately, the cells become dikaryotic, meaning they contain two separate nuclei (n + n).

6. **Largest Phase of Nuclear Condition**:
- The dikaryotic phase (n + n) is the most prominent and longest-lasting phase in the life cycle of Agaricus, as it allows for genetic diversity and adaptation.

7. **Conclusion**:
- Therefore, the largest phase of nuclear condition in Agaricus is the dikaryotic phase, represented as n + n.

### Final Answer:
The largest phase of nuclear condition in Agaricus is the dikaryotic phase (n + n).

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