In mosquitoes, the sex differentiation can be done on the basis of

Options

A. size of wings
B. Antennae
C. Antennae and maxillary palps
D. Ocelli.

Answer

To determine the sex differentiation in mosquitoes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Dioecious Organisms**:
- Mosquitoes are dioecious, meaning they have distinct male and female individuals. This is important because it sets the stage for how we can differentiate between the sexes.

2. **Identifying Sexual Dimorphism**:
- Sexual dimorphism refers to the differences in morphology between male and female organisms. In mosquitoes, we can observe such differences.

3. **Evaluating the Given Options**:
- The options provided are:
- A. Size of wings
- B. Antennae
- C. Antennae and maxillary palps
- D. Ocelli

4. **Analyzing Each Option**:
- **Size of Wings**: There is no significant difference in the size of wings between male and female mosquitoes, making this option incorrect.
- **Antennae**: Male mosquitoes have bushier antennae with auditory receptors to detect the characteristic sound (whine) made by females during mating. Female mosquitoes have less bushy antennae. This indicates that antennae can be used for differentiation.
- **Antennae and Maxillary Palps**: Male mosquitoes have longer maxillary palps (sensory organs) compared to females. This reinforces the idea that both antennae and maxillary palps can be used for differentiation.
- **Ocelli**: Ocelli are simple eyes, and they do not provide a basis for differentiating between male and female mosquitoes.

5. **Conclusion**:
- Based on the analysis, the correct option for sex differentiation in mosquitoes is **C. Antennae and maxillary palps**.

### Final Answer:
The sex differentiation in mosquitoes can be done on the basis of **antennae and maxillary palps**.

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