Read the following text and answer the following questions on the basis of the same:
Transgenic animals have their DNA manipulated to possess and express an extra gene. The genome of these animals has been changed and they can carry genes from other species. The first transgenic sheep was Tracy. The reason behind producing these transgenic animals are for specific economic trait, some are produced as disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied)
The 1st transgenic cow is :

Options

A. Mosie
B. Rosie
C. Dosie
D. Cowsie

Explanation

To answer the question regarding the first transgenic cow based on the provided text, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Transgenic Animals**:
- Transgenic animals are those whose DNA has been altered to include an extra gene, allowing them to express traits from other species.

2. **Identifying the First Transgenic Sheep**:
- The text mentions that the first transgenic sheep was named Tracy. This is important as it sets a precedent for transgenic animals.

3. **Purpose of Creating Transgenic Animals**:
- The passage explains that transgenic animals are produced for specific economic traits or as disease models. This means they can be used in agriculture for better yields or in research to study diseases.

4. **Finding Information on the First Transgenic Cow**:
- The question specifically asks for the name of the first transgenic cow. The transcript mentions several names: Moosie, Roosie, Doosie, and Cowsie.

5. **Identifying the Correct Answer**:
- According to the transcript, the first transgenic cow is Roosie, which was created in 1997. It was genetically modified to produce milk enriched with human protein, specifically human alpha-lactalbumin.

6. **Final Answer**:
- Therefore, the first transgenic cow is Roosie.