DNA finger printing involves the use of

Options

A. DNA
B. mRNA
C. r-RNA
D. t-RNA

Answer

**Step-by-Step Solution:**

1. **Understanding DNA Fingerprinting**: DNA fingerprinting is a technique used to identify individuals based on their unique DNA profiles. It is commonly used in paternity testing and forensic science.

2. **Components Involved**: The primary component used in DNA fingerprinting is DNA itself. Other types of nucleic acids like mRNA, RNA, and P RNA are not utilized in this process.

3. **Sample Collection**: The process begins with the collection of biological samples, which can include blood, saliva, or other tissues from the individuals whose DNA is being analyzed.

4. **DNA Extraction**: From the collected samples, DNA is extracted. This involves breaking down the cell membranes and separating the DNA from other cellular components.

5. **Purification of DNA**: After extraction, the DNA must be purified to remove any contaminants that could interfere with the analysis.

6. **Gel Electrophoresis**: The purified DNA is then subjected to gel electrophoresis, a technique that separates DNA fragments based on their size. This allows for the visualization of the DNA bands.

7. **Observation of DNA Bands**: The separated DNA bands are observed using techniques like autoradiography or radiography. This step is crucial for comparing the DNA profiles of different samples.

8. **Comparison and Analysis**: Finally, the DNA bands obtained from different samples are compared to determine similarities or differences, which can help in identifying relationships or confirming identities.

**Conclusion**: In summary, DNA fingerprinting involves the use of DNA extracted from biological samples, and it does not involve mRNA, RNA, or P RNA.

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