Mutation that occurs due to addition of a part of chromosome so that gene(s) is/are represented twice,is called

Options

A. Addition
B. Insertion
C. Duplication
D. Transition

Answer

To solve the question regarding the type of mutation that occurs due to the addition of a part of a chromosome, resulting in genes being represented twice, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific type of mutation characterized by the addition of a part of a chromosome, leading to the duplication of genes.

2. **Analyze the Options**: The options given are:
- A) Addition
- B) Insertion
- C) Duplication
- D) Transition

3. **Evaluate Each Option**:
- **Option A: Addition** - This term is too vague and does not specifically refer to the duplication of genetic material.
- **Option B: Insertion** - This refers to the addition of one or more nucleotide base pairs into a DNA sequence, but it does not imply that a part of a chromosome is added to create a duplicate.
- **Option C: Duplication** - This term specifically refers to a mutation where a segment of the chromosome is copied, resulting in the genes being represented twice. This matches the description given in the question.
- **Option D: Transition** - This is a specific type of point mutation that involves the substitution of one nucleotide for another and does not relate to the duplication of genes.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **Option C: Duplication**. This mutation occurs when a part of a chromosome is abnormally copied, leading to an extra copy of the genetic material.

### Final Answer:
The mutation that occurs due to the addition of a part of a chromosome so that gene(s) is/are represented twice is called **Duplication**.

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