Question

In the schematic representation, few representative chromosomes have been shown contain different copy numbers of VNTR. Which of the following individuals is criminal on the behalf of this?

• A.
  Can’t be predicated
• B.
  Neither $‘A^{\prime }$ nor $‘B^{\prime }$, any other individual
• C.
  Individual $‘B^{\prime }$
• D.
  Individual ‘$A$’

Answer 1

The correct option is C

Individual $‘B^{\prime }$
DNA fingerprinting

DNA fingerprinting is a technique that allows the identification of genetic features which are unique to each organism and distinguishes it from other individuals.

VNTR

VNTR (Variable Number of Tandem Repeats) is a satellite DNA that has a very high degree of polymorphism (variations at genetic level).

Case-specific solution

In the given image, the size of DNA bands of individual B are exactly matching with that found at the crime scene in the autoradiograph. This signifies that similar fragments are produced after restriction digestion of the samples. This indicates that they carry almost identical sequences and are most closely related. Thus, individual B is the criminal.

Final answer:

(b) Individual ‘B’