A diploid cell has 2n = 4. If this cell divides by mitosis, how many types of genotypes are formed amongst the daughter cells ?

Options

A. 1
B. 2
C. 3
D. 4

Answer

To solve the question regarding how many types of genotypes are formed amongst the daughter cells when a diploid cell with 2n = 4 divides by mitosis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Diploid Cells**:
- A diploid cell has two sets of chromosomes. In this case, 2n = 4 means there are 4 chromosomes in total. This means there are 2 pairs of homologous chromosomes.

2. **Mitosis Overview**:
- Mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. This is known as an equational division.

3. **Genotype Consistency**:
- Since mitosis produces daughter cells that are identical to the parent cell, the genotype of the daughter cells will be the same as that of the parent cell.

4. **Determining Types of Genotypes**:
- Because the daughter cells are genetically identical to the parent cell, there is only one type of genotype that can be formed among the daughter cells.

5. **Conclusion**:
- Therefore, the answer to the question is that there is only **1 type of genotype** formed among the daughter cells.

### Final Answer:
The correct answer is **Option A: 1**.

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