Q. What is it that forms the basis of DNA fingerprinting?
A) The relative proportions of purines and pyrimidines in DNA
B) The relative difference in the DNA occurrence in blood, skin and saliva
C) The relative amount of DNA in the ridges and grooves of the fingerprints
D) Satellite DNA occurring as highly repeated short DNA segments
Explanation
[Solution from source] DNA fingerprinting compares repetitive DNA, satellite DNA such as VNTRs whose copy number differs between people. The purine to pyrimidine ratio is the same in everyone, and the technique has nothing to do with skin ridges. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.