Which is not true w.r.t transgenic animals and their contribution to human welfare?

Options

A. Transgenic mice are being tested to ensure safety of polio vaccine.
B. Rosic's milk contained human gene insulin.
C. Transgenic cows produce milk with less lactose.
D. Transgenic sheep grow more wool.

Answer

**Step-by-Step Solution:**

1. **Understanding Transgenic Animals**: Transgenic animals are those whose genetic material has been altered through biotechnology to express desired traits or produce specific products beneficial to humans.

2. **Analyzing the Options**:
- **Option 1**: Transgenic mice are tested to ensure the safety of the polio vaccine.
- This statement is true. Transgenic mice are widely used in research, including vaccine safety testing.
- **Option 2**: Rosie's milk contains human gene insulin.
- This statement is not true. Rosie, the first transgenic cow, produced milk enriched with human alpha-lactalbumin, not insulin.
- **Option 3**: Transgenic cows produce milk with less lactose.
- This statement is true. Genetic modifications can lead to the production of milk with lower lactose levels, making it more suitable for lactose-intolerant individuals.
- **Option 4**: Transgenic sheep grow more wool.
- This statement is true. Genetic modifications in sheep can enhance wool production.

3. **Identifying the Incorrect Statement**: After evaluating all options, it is clear that Option 2 is the only statement that is not true regarding transgenic animals and their contributions to human welfare.

4. **Conclusion**: The correct answer to the question "Which is not true w.r.t transgenic animals and their contribution to human welfare?" is Option 2.

---