Select the CORRECT sequence of events with respect to the fungal sexual cycle.

Options

A. Karyogamy, plasmogamy and meiosis
B. Meiosis, plasmogamy and karyogamy
C. Plasmogamy, karyogamy and meiosis
D. Meiosis, karyogamy and plasmogamy

Answer

To solve the question regarding the correct sequence of events in the fungal sexual cycle, we need to understand the three key processes involved: Plasmogamy, Karyogamy, and Meiosis. Here’s a step-by-step breakdown of the correct sequence:

### Step 1: Understand the Terms
- **Plasmogamy**: This is the initial stage of sexual reproduction in fungi where the cytoplasm of two parent cells fuses together. However, the nuclei remain separate at this stage.
- **Karyogamy**: This is the subsequent step where the nuclei of the two fused cells (from plasmogamy) finally merge to form a diploid nucleus.
- **Meiosis**: This is the final step where the diploid nucleus undergoes meiosis to produce haploid spores, which can develop into new fungal organisms.

### Step 2: Identify the Correct Sequence
From the definitions:
1. **Plasmogamy** occurs first.
2. **Karyogamy** follows plasmogamy.
3. **Meiosis** occurs last.

Thus, the correct sequence of events in the fungal sexual cycle is:
**Plasmogamy → Karyogamy → Meiosis**

### Step 3: Evaluate the Options
Now, let’s evaluate the options provided in the question:
1. Karyogamy, Plasmogamy, Meiosis - Incorrect
2. Meiosis, Plasmogamy, Karyogamy - Incorrect
3. Plasmogamy, Karyogamy, Meiosis - Correct
4. (Not mentioned but assumed to be incorrect based on context)

### Conclusion
The correct answer is option 3: **Plasmogamy, Karyogamy, Meiosis**.

---