A molecule that can act as a genetic material must fulfill the traits given below, except

Options

A. it shouldb be able to express itself in the form of 'mendelian characters'
B. it should be able to generate its replica
C. it should be unstable structurally and chemically
D. it should provide the scope for slow changes that are requird for evolution

Answer

To determine which trait a molecule that can act as genetic material should not possess, we will analyze the given traits one by one.

### Step-by-Step Solution:

1. **Understanding the Traits of Genetic Material**:
- Genetic material must have specific characteristics to function effectively. These include stability, the ability to replicate, and the capacity to express traits.

2. **Trait Analysis**:
- **Trait 1**: It should be able to express itself in the form of Mendelian characters.
- This trait is essential because genetic material must convey information that can be passed on to the next generation, which aligns with Mendelian inheritance.
- **Trait 2**: It should be able to generate its replica.
- This is crucial for inheritance. Genetic material must replicate itself accurately during cell division to ensure that genetic information is passed to progeny.
- **Trait 3**: It should be unstable structurally and chemically.
- This trait is problematic. Genetic material must be stable to maintain its integrity over time. Instability would lead to mutations and loss of genetic information, which is not desirable.
- **Trait 4**: It should provide the scope for slow changes that are required for evolution.
- This is true. Genetic material should allow for variations, which are essential for evolution. However, these changes should occur without compromising the overall stability of the genetic material.

3. **Conclusion**:
- Among the traits listed, the third trait, "it should be unstable structurally and chemically," is the one that a molecule acting as genetic material should not possess. Stability is crucial for maintaining genetic integrity and ensuring reliable inheritance.

### Final Answer:
The correct answer is **C: It should be unstable structurally and chemically**.

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