Which of the following are transgenic organisms?

Options

A. Holly Sheep and Flavr Savr tomato
B. Holly Sheep and Bt cotton
C. Dolly Sheep and Bt cotton
D. Flavr Savr tomato and Bt cotton

Explanation

To determine which of the following are transgenic organisms, we need to understand the definition of transgenic organisms and analyze the options provided.

### Step-by-Step Solution:

1. **Understand Transgenic Organisms**:
- Transgenic organisms are those that have had a foreign gene inserted into their genome. This foreign DNA can come from different species and is introduced through genetic engineering techniques.

2. **Review the Options**:
- Option 1: Holly sheep and flower sard meto
- Option 2: Holly sheep and B.T. cotton
- Option 3: Dolly sheep and B.T. cotton
- Option 4: Flower sard meto and B.T. cotton

3. **Analyze Each Option**:
- **Option 1**: Holly sheep and flower sard meto
- Holly sheep is not a recognized transgenic organism. Therefore, this option is incorrect.
- **Option 2**: Holly sheep and B.T. cotton
- Again, Holly sheep is not a transgenic organism. This option is incorrect.
- **Option 3**: Dolly sheep and B.T. cotton
- Dolly sheep is a clone and not a transgenic organism. This option is incorrect.
- **Option 4**: Flower sard meto and B.T. cotton
- Flower sard meto (Flavr Savr tomato) is a transgenic organism created to resist rotting by silencing the gene that produces the PG enzyme. B.T. cotton is also a transgenic organism that has been modified to express a toxin from Bacillus thuringiensis to resist insect damage.

4. **Conclusion**:
- The correct answer is **Option 4: Flower sard meto and B.T. cotton** as both are transgenic organisms.