Choose correct option w.r.t division during gamete formation and division in zygote for organisms having haplontic life cycle respectively

Options

A. Mitosis, mitosis
B. Meiosis, meiosis
C. Mitosis, meiosis
D. Meiosis, mitosis

Answer

To solve the question regarding the type of division during gamete formation and during division in the zygote for organisms with a haplontic life cycle, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Haploontic Life Cycle**:
- In organisms with a haplontic life cycle, the dominant stage is the gametophyte, which is haploid (n).

2. **Gamete Formation**:
- The gametophyte undergoes **mitosis** to produce gametes. Since the gametophyte is already haploid, the division is mitotic, resulting in the formation of male and female gametes.

3. **Fertilization**:
- The male and female gametes then fuse during fertilization, a process known as **syngamy**, to form a diploid zygote.

4. **Division of the Zygote**:
- The zygote, being diploid (2n), undergoes **meiosis** to produce haploid spores. This process is referred to as zygotic meiosis.

5. **Conclusion**:
- Therefore, the type of division during gamete formation is **mitosis**, and the type of division during the zygote formation is **meiosis**.

### Final Answer:
The correct option with respect to division during gamete formation and division in the zygote for organisms having a haplontic life cycle is **Mitosis (for gamete formation) and Meiosis (for zygote division)**.