Question

Below diagram represents the DNA fingerprinting. Which is true?

A. All are graphically similar
B. All are graphically dissimilar
C. Only A and C are similar
D. Only B and D are similar

Answer 1

Hint: Professor Sir Alec Jeffreys devised DNA fingerprinting in \[1984\] after noticing that differences in human DNA may be detected in the form of these minisatellites. DNA fingerprinting is a technology that detects a large number of minisatellites in the genome at the same time to create a pattern that is unique to an individual. A DNA fingerprint is an image of a person's DNA. Likely, different persons with the same DNA fingerprint aren't identical twins. Your DNA fingerprint is unique to you, just like your physical fingerprint.

Complete answer:
Option 1) All are graphically similar: No, they all are not graphically similar but two of them only similar one to other.
Hence, option 1) is incorrect.
Option 2) All are graphically dissimilar: there is two of them similar to each other
Hence, option 2) is correct.
Option 3) Only A and C are similar. The A and C diagrams are only similar to each other.
Hence, option 3) is correct.
Option 4) Only B and D are similar: This option is completely wrong because B and D are completely different from one another.
Hence, option 4) is incorrect.
DNA fingerprint test:
You would submit a sample of cells from your body to receive your DNA fingerprint. It could originate from a swab inside your mouth, your skin, your hair roots, or your saliva, blood, or other bodily fluids. The most common method is to use blood. Chemicals used to remove the DNA from the material, which dissolved in water.
Another chemical reaction divides your DNA into smaller segments, yielding parts of \[5\] to \[10\] base pairs that repeat themselves. To make the samples lengthier and easier to study, technicians copy those little pieces millions of times.
Workers in the lab combine the pieces of DNA in a gel. Then they use an electric current to separate the tiny strands of DNA from the bigger ones on the gel. When the DNA strips are exposed to ultraviolet light or laser light, a dye added to the gel makes them stand out.
The DNA profile will become more accurate as more of these small pieces are analyzed. The strips will display a barcode-like pattern that may be compared to the results of another DNA sample to see if there is a match.

Hence, Option 3) is the correct answer.

Note:
DNA fingerprinting is a molecular genetic technique that uses hair, blood or other biological fluids or samples to identify people. It is possible thanks to polymorphisms (unique patterns) in their DNA. Genetic fingerprinting, DNA typing and DNA profiling are all terms used to describe the process.
When DNA fingerprinting utilised in forensic research, probes are used to target sections of DNA that are unique to humans, removing the chance of contamination from bacteria, plants, insects, or other sources.