Number of mitotic divisions required for the formation of 128 cells :

Options

A. 127
B. 32
C. 12
D. 7

Answer

To determine the number of mitotic divisions required to form 128 cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mitosis**: Mitosis is a type of cell division where one cell divides to form two identical daughter cells. This process can be repeated multiple times.

2. **Starting with One Cell**: We begin with a single cell. After one mitotic division, this cell will divide into two cells.

3. **Calculating Subsequent Divisions**:
- After 1 division: 1 cell → 2 cells
- After 2 divisions: 2 cells → 4 cells
- After 3 divisions: 4 cells → 8 cells
- After 4 divisions: 8 cells → 16 cells
- After 5 divisions: 16 cells → 32 cells
- After 6 divisions: 32 cells → 64 cells
- After 7 divisions: 64 cells → 128 cells

4. **Counting the Divisions**: From the calculations above, we see that it takes a total of 7 mitotic divisions to go from 1 cell to 128 cells.

5. **Conclusion**: Therefore, the number of mitotic divisions required for the formation of 128 cells is **7**.

### Final Answer:
The number of mitotic divisions required for the formation of 128 cells is **7**.

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