The first transgenic cow developed in 1997 was

Options

A. Dolly
B. Rosie
C. Ruby
D. Lily

Answer

**Step-by-Step Solution:**

1. **Understanding Transgenic Cows:**
- A transgenic cow is an animal whose genome has been altered by the transfer of a gene or genes from another species or breed. This process is done to enhance certain traits, such as milk production.

2. **Identifying the First Transgenic Cow:**
- The question asks for the name of the first transgenic cow developed in 1997.

3. **Options Provided:**
- The options given are Dolly, Rosy, Ruby, and Lily.

4. **Recalling Historical Context:**
- Dolly was the first cloned sheep, not a cow. This helps eliminate that option.
- The correct answer, as stated in the video, is Rosy, which was developed in 1997.

5. **Understanding the Purpose of Rosy:**
- Rosy was genetically engineered for enhanced milk production, specifically to produce milk enriched with a human protein called alpha-lactalbumin. This makes the milk easier to digest for infants and the elderly.

6. **Final Answer:**
- Therefore, the first transgenic cow developed in 1997 was **Rosy**.

---