Rosie is

Options

A. transgenic cow with a human gene
B. transgenic goat with a human gene
C. transgenic cow with a pig gene
D. transgenic goat with a pig gene.

Answer

To solve the question regarding Rosie, we need to analyze the options provided and determine which one accurately describes her.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about "Rosy" and provides several options regarding her genetic modification.

2. **Analyzing Option 1**:
- **Statement**: "Transgenic cow with a human gene."
- **Explanation**: This option is correct. Rosie is a genetically modified cow that has been engineered to produce milk containing human proteins, specifically human alpha-lactalbumin. This makes the milk more suitable for human consumption, especially for infants.

3. **Analyzing Option 2**:
- **Statement**: "Transgenic goat with a human gene."
- **Explanation**: This option is incorrect. Rosie is not a goat; she is specifically a cow.

4. **Analyzing Option 3**:
- **Statement**: "Transgenic cow with a pig gene."
- **Explanation**: This option is also incorrect. Rosie does not contain pig genes; she has been modified with human genes.

5. **Analyzing Option 4**:
- **Statement**: "Transgenic goat with a pig gene."
- **Explanation**: This option is incorrect as well. Rosie is not a goat and does not involve pig genes.

6. **Conclusion**: The only correct option is the first one, which states that Rosie is a transgenic cow with a human gene.

### Final Answer:
**Option 1: Transgenic cow with a human gene.**

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