95 % of the existing transgenic animals are

Options

A. fish
B. pigs
C. sheep
D. mice

Explanation

**Step-by-Step Solution:**

1. **Understanding Transgenic Animals**: Transgenic animals are those whose DNA has been altered by the insertion of foreign genes. This genetic manipulation is done to achieve specific traits or produce desired products for human welfare.

2. **Examples of Transgenic Animals**: Various species have been genetically modified, including rats, rabbits, pigs, sheep, cows, and fish. These modifications are typically aimed at improving agricultural productivity, disease resistance, or producing pharmaceuticals.

3. **Majority of Transgenic Animals**: The question specifically asks about the percentage of existing transgenic animals. It is noted that 95% of all transgenic animals are mice. This indicates that while many species can be genetically modified, the majority of research and development in transgenic animals has been conducted using mice.

4. **Conclusion**: Therefore, the correct answer to the question "95% of the existing transgenic animals are" is that they are mice.

**Final Answer**: 95% of the existing transgenic animals are mice.

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