After which stage cleavage stopped :-

Options

A. After morula
B. After blastula
C. After gastrula
D. Any time it stops

Answer

### Step-by-Step Solution:

1. **Understanding Cleavage**: Cleavage is the series of rapid cell divisions that occur after the fertilization of the egg, leading to the formation of a multicellular embryo. It begins with the zygote, which is formed by the fusion of male and female gametes.

2. **Identifying the Stages**: The cleavage process continues through several stages:
- **Zygote**: The fertilized egg, which is diploid.
- **Morula**: This is the stage where the embryo consists of 16 cells. It is formed by mitotic divisions of the zygote.
- **Blastula**: Following the morula, the blastula stage is characterized by a hollow sphere of cells, typically consisting of around 32 cells.

3. **Transition to Gastrulation**: After the blastula stage, the embryo undergoes a process called gastrulation, which leads to the formation of the three germ layers (ectoderm, mesoderm, and endoderm). This marks the end of the cleavage stage.

4. **Conclusion**: Cleavage stops after the formation of the blastula. Therefore, the correct answer to the question is "after Blastula".

### Final Answer:
Cleavage stops after the Blastula stage.

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