With respect to fungal sexual cycle, choose the correct sequence of events

Options

A. Karyogamy, Plasmogamy and Meiosis
B. Meiosis, Plasmogamy and Karyogamy
C. Plasmogamy, Karyogamy and Meiosis
D. Meiosis, Karyogamy and Plasmogamy

Answer

To determine the correct sequence of events in the fungal sexual cycle, we can break down the process into three main stages: plasmogamy, karyogamy, and meiosis. Here’s a step-by-step explanation of these events:

### Step-by-Step Solution:

1. **Plasmogamy**:
- This is the first step in the fungal sexual cycle. It involves the fusion of the cytoplasm of two different mating types (gametes). In fungi, this can occur between motile gametes (which can move) and non-motile gametes (which cannot move and lack flagella). The result of plasmogamy is a cell with two distinct nuclei, a condition known as dikaryon.

2. **Karyogamy**:
- Following plasmogamy, the next step is karyogamy. In this stage, the two nuclei that were formed during plasmogamy fuse together to form a single diploid nucleus. This fusion of nuclei is crucial as it leads to the formation of a zygote.

3. **Meiosis**:
- The final step in the sexual cycle is meiosis. After the formation of the diploid zygote from karyogamy, this zygote undergoes meiotic division. Meiosis reduces the chromosome number by half, resulting in the formation of haploid spores. These spores can then germinate and develop into new fungal organisms.

### Correct Sequence of Events:
- **Plasmogamy → Karyogamy → Meiosis**