Genetic engineering aims at:

Options

A. Destroying wild gene
B. Preserving defective gene
C. Curing human disease by introducing new gene (hemophilia)
D. All these above

Answer

**Step-by-Step Text Solution:**

1. **Understanding Genetic Engineering**:
- Genetic engineering is the manipulation of an organism's genome using recombinant DNA technology. It involves altering the genetic constitution of an organism to achieve desired traits or outcomes.

2. **Analyzing the Options**:
- **Option A: Destroying wild genes**: This option suggests that genetic engineering aims to destroy natural genes. This is incorrect, as genetic engineering focuses on modifying genes rather than destroying them.
- **Option B: Preserving defective genes**: This option implies that genetic engineering aims to keep defective genes intact. This is also incorrect, as the goal is typically to replace or correct defective genes.
- **Option C: Curing human diseases by introducing new genes**: This option states that genetic engineering can cure diseases by replacing defective genes with healthy ones. This is a correct application of genetic engineering, as seen in therapies for genetic disorders like hemophilia.
- **Option D: All of the above**: This option suggests that all previous statements are correct. However, since options A and B are incorrect, this option cannot be correct.

3. **Conclusion**:
- After analyzing all the options, the most accurate aim of genetic engineering is reflected in **Option C**, which is curing human diseases by introducing new genes.

**Final Answer**: Curing human diseases by introducing new genes.

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