A : Unknown DNA after hybridization with VNTR probe, the autoradiogram gives may bands of differing sizes in DNA profiling .
R: These bands represents DNA fingerpint of organism.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark
B. If both Assertion & Reason are true and the reason is not the correct explanation of the assertion , then mark
C. If Assertion is true statement but Reason is false, then mark.
D. If both Assertion and Reason are false statements, then mark.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion (A)**: The assertion states that unknown DNA, after hybridization with a VNTR (Variable Number Tandem Repeat) probe, produces an autoradiogram with many bands of differing sizes in DNA profiling.

- **Explanation**: VNTRs are regions in the DNA that consist of repeated sequences. When DNA is subjected to techniques like hybridization with VNTR probes, these regions can be visualized as bands on an autoradiogram. The varying sizes of these bands indicate the different lengths of the VNTRs present in the DNA sample.

2. **Understanding the Reason (R)**: The reason states that these bands represent the DNA fingerprint of an organism.

- **Explanation**: The unique pattern of bands produced by the VNTRs in an individual's DNA is often referred to as a DNA fingerprint. This pattern is unique to each organism (except identical twins) and can be used for identification purposes, such as in forensic science or paternity testing.

3. **Evaluating the Truth of Assertion and Reason**: Both the assertion and the reason are true. The assertion correctly describes the process of DNA profiling using VNTRs, and the reason accurately explains that the resulting bands are indeed a representation of the organism's DNA fingerprint.

4. **Determining the Relationship**: The reason provided is a correct explanation of the assertion. The bands observed in the autoradiogram are directly related to the concept of DNA fingerprinting, as they reflect the unique genetic makeup of the organism.

5. **Conclusion**: Therefore, both the assertion and the reason are true, and the reason is a correct explanation of the assertion.

**Final Answer**: Both assertion (A) and reason (R) are true, and R is the correct explanation of A.

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