The smallest unit of genetic material which upon mutation produce a phenotypic effect is :-

Options

A. Mutons
B. Inducer gene
C. Mutator gene
D. Regulator gene

Answer

To solve the question "The smallest unit of genetic material which upon mutation produces a phenotypic effect is:", we can follow these steps:

### Step 1: Understand the Terminology
- **Genetic Material**: Refers to DNA or RNA, which carries genetic information.
- **Mutation**: A change in the DNA sequence that can affect the function of genes.
- **Phenotypic Effect**: The observable traits or characteristics that result from the expression of genes.

### Step 2: Identify the Smallest Unit
- The smallest unit of genetic material is a **gene**. Genes are segments of DNA that encode for proteins or functional RNA, and they are responsible for hereditary traits.

### Step 3: Relate Mutation to Phenotypic Effect
- When a mutation occurs in a gene, it can lead to changes in the protein produced, which can subsequently affect the phenotype (the observable characteristics) of an organism.

### Step 4: Conclusion
- Therefore, the answer to the question is that the smallest unit of genetic material which, upon mutation, produces a phenotypic effect is called a **mutant**.

### Final Answer
- The smallest unit of genetic material which upon mutation produces a phenotypic effect is called a **mutant**.

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