In humans the number of tetrads formed during mitosis is

Options

A. 0
B. 4
C. 23
D. 26

Answer

To solve the question about the number of tetrads formed during mitosis in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Tetrad**:
- A tetrad is a structure formed during meiosis, consisting of a pair of homologous chromosomes, each made up of two sister chromatids. This means that a tetrad contains a total of four chromatids.

2. **Identify the Process in Question**:
- The question specifically asks about mitosis, which is a type of cell division that results in two genetically identical daughter cells.

3. **Differentiate Between Mitosis and Meiosis**:
- In meiosis, tetrads are formed during prophase I when homologous chromosomes pair up.
- In contrast, mitosis does not involve the pairing of homologous chromosomes. Instead, sister chromatids are separated into two daughter cells.

4. **Conclusion About Tetrads in Mitosis**:
- Since tetrads are formed only during meiosis and not during mitosis, we conclude that no tetrads are formed during mitosis.

5. **Final Answer**:
- Therefore, the number of tetrads formed during mitosis in humans is **zero**.

### Answer:
The number of tetrads formed during mitosis in humans is **0**.