Grasshopper is an example of XO type of sex determination in which the males have_______

Options

A. one X chromosome
B. One Y chromosome
C. two Y chromosomes
D. no X-chromosome

Answer

To solve the question regarding the sex determination in grasshoppers, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the sex determination system in grasshoppers, specifically what type of chromosomes males have.

2. **Identify the Type of Sex Determination**: Grasshoppers exhibit an XO type of sex determination. This means that males have one X chromosome and no corresponding Y chromosome.

3. **Analyze the Options**:
- **Option 1**: 1 X chromosome - This is correct because males in grasshoppers have one X chromosome.
- **Option 2**: 1 Y chromosome - This is incorrect as grasshoppers do not have a Y chromosome in males.
- **Option 3**: 2 Y chromosomes - This is incorrect as males do not have any Y chromosomes.
- **Option 4**: No X chromosome - This is also incorrect because males do have one X chromosome.

4. **Conclusion**: Based on the analysis, the correct answer is that males have **1 X chromosome**.

### Final Answer:
Males have **1 X chromosome**.

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