Select the incorrect statement about DNA fingerprinting among the following.

Options

A. It involves identifying differences of repetitive DNA
B. The small peaks formed during the density gradient of DNA are called satellite DNA
C. Satellite DNA codes for proteins which forms a large portion of the human genome.
D. Polymorphisms are inheritable from parents to children

Answer

To solve the question regarding DNA fingerprinting and identify the incorrect statement, we can follow these steps:

### Step-by-Step Solution:

1. **Understand DNA Fingerprinting**:
- DNA fingerprinting is a technique used to identify individuals based on their unique DNA profiles. It primarily focuses on repetitive DNA sequences.

**Hint**: Recall that DNA fingerprinting is based on the uniqueness of DNA sequences among individuals.

2. **Analyze the Statements**:
- **Statement 1**: "It involves identifying the differences in repeated DNA."
- This statement is true. DNA fingerprinting indeed identifies variations in repetitive DNA sequences.

**Hint**: Think about how repetitive DNA contributes to individual differences.

3. **Evaluate the Second Statement**:
- **Statement 2**: "The small peaks formed during the density gradient of DNA are called satellite DNA."
- This statement is also true. In the context of DNA fingerprinting, small peaks represent satellite DNA, which consists of repetitive sequences.

**Hint**: Consider the role of satellite DNA in the context of DNA separation techniques.

4. **Assess the Third Statement**:
- **Statement 3**: "Satellite DNA is coded for protein, which makes a large portion of the human genome."
- This statement is incorrect. Satellite DNA does not code for proteins; it consists of repetitive sequences that do not typically have coding functions. Instead, it is the repetitive DNA that constitutes a large portion of the human genome.

**Hint**: Remember that not all DNA sequences code for proteins; some are non-coding.

5. **Review the Fourth Statement**:
- **Statement 4**: "Polymorphism is inheritable from parents to children."
- This statement is true. Polymorphism refers to the variations in DNA that can be passed from parents to offspring.

**Hint**: Think about how genetic traits are inherited.

6. **Conclusion**:
- Based on the analysis, the incorrect statement is the third one: "Satellite DNA is coded for protein, which makes a large portion of the human genome."

### Final Answer:
The incorrect statement about DNA fingerprinting is: **"Satellite DNA is coded for protein, which makes a large portion of the human genome."**