The cleavage divisions in humans is

Options

A. holoblastic equal and indeterminate
B. holoblastic , unequal and indeterminate
C. holoblastic equal and determinate
D. holoblastic unequal and determinate

Answer

### Step-by-Step Solution:

1. **Understanding Cleavage Divisions**: Cleavage divisions refer to the series of rapid cell divisions that occur after fertilization, leading to the formation of a multicellular embryo.

2. **Types of Cleavage**: There are two main types of cleavage:
- **Holoblastic Cleavage**: This type involves complete division of the egg into smaller cells. It occurs in eggs with little yolk, allowing for equal division.
- **Meroblastic Cleavage**: This type involves partial division of the egg, typically seen in eggs with a large amount of yolk. The division is unequal, resulting in one large cell and smaller cells.

3. **Cleavage in Humans**: In humans, the cleavage is classified as:
- **Holoblastic**: The cleavage is complete, and the cells divide equally because the amount of yolk in human eggs is minimal.
- **Equal Division**: The cells formed during cleavage are of equal size, which is characteristic of holoblastic cleavage.

4. **Determined vs. Indeterminate Cleavage**:
- **Determined Cleavage**: In this type, the fate of the cells is predetermined. If a cell is separated, it will not form a new organism.
- **Indeterminate Cleavage**: In this type, the fate of the cells is not predetermined. If a cell is separated, it has the potential to develop into a new organism. This is the case in humans.

5. **Conclusion**: Therefore, the cleavage divisions in humans are characterized as holoblastic, equal, and indeterminate.

### Final Answer:
The cleavage divisions in humans are holoblastic, equal, and indeterminate.

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