Which of these animals produce gametes by mitosis ?

Options

A. Fruit flies
B. Rats
C. Grasshoppers
D. Drones

Answer

To solve the question "Which of these animals produce gametes by mitosis?" we will analyze the options provided and understand the processes of mitosis and meiosis in relation to gamete production.

### Step-by-Step Solution:

1. **Understanding Mitosis and Meiosis**:
- Mitosis is a type of cell division that results in two daughter cells with the same number of chromosomes as the parent cell. It is known as equational division.
- Meiosis, on the other hand, is a reductional division that produces gametes with half the number of chromosomes (haploid) compared to the parent cell (diploid).

2. **Analyzing the Options**:
- **Fruit Flies**: These organisms are diploid (2n) and produce gametes through meiosis, resulting in haploid (n) gametes.
- **Rats**: Similar to fruit flies, rats are also diploid and produce gametes via meiosis.
- **Grasshoppers**: Grasshoppers are also diploid and produce gametes through meiosis.
- **Drones (Male Bees)**: Drones are haploid (n) organisms. They produce gametes through mitosis since they already have a haploid set of chromosomes.

3. **Conclusion**:
- Among the given options, only drones produce gametes by mitosis. The other animals (fruit flies, rats, and grasshoppers) produce gametes through meiosis.

### Final Answer:
**Drones (Male Bees)** produce gametes by mitosis.