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Which of the following statement forms the basis of $DNA$ fingerprinting?
The relative proportions of purines and pyrimidines in $DNA.$
Satellite $DNA$ occurring as highly repeated short $DNA$ segments.
The relative difference in the $DNA$ occurrence in blood, skin and saliva.
The relative amount of $DNA$ in the ridges and grooves of the fingerprints.
Solution
$DNA$ fingerprinting is a test to identify and evaluate the genetic information called $DNA$ (deoxyribonucleic acid) in a person's cells. $DNA$ fingerprinting is a form of identification based on sequencing specific non-coding portions of $DNA$ that are known to have a high degree of variability from person to person. These sections are known as tandem repeats. The test is used to determine whether a family relationship exists between two people, to identify organisms causing a disease, and to solve criminal cases.
