During cleavage all division are

Options

A. Equal
B. Reductional
C. Mitotic
D. Determinate.

Answer

**Step-by-Step Solution:**

1. **Understanding Cleavage**: Cleavage is the early stage of embryonic development that occurs after fertilization. It involves a series of rapid cell divisions that transform the single-celled zygote into a multicellular structure.

2. **Identifying the Type of Division**: During cleavage, the type of cell division that occurs is crucial to understanding the process. The options provided are:
- A) Equal
- B) Reductional
- C) Mitotic
- D) Determinant

3. **Analyzing the Process**: Cleavage involves mitotic divisions, where the zygote divides into smaller cells called blastomeres without significant growth in size. This results in the formation of structures like the morula and blastula.

4. **Recognizing the Pattern of Division**: The cleavage divisions are characterized by the doubling of cell numbers (2 cells, then 4 cells, then 8 cells, and so on). This indicates that the divisions are not only occurring but are also mitotic in nature.

5. **Conclusion**: Based on the understanding that cleavage involves a series of mitotic divisions, the correct answer to the question is option C) Mitotic.

**Final Answer**: C) Mitotic

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