Alec Jeffreys used $ . . . . . . $ as a genetic marker.

In a crime investigation,the investigating officer collects different biological samples from the crime spot for $DNA$ fingerprinting analysis. Which of the following samples is not helpful in this analysis?

$A$: In $DNA$ fingerprinting,hybridization is done with molecular probes.
$R$: Molecular probes are small $DNA$ segments synthesized in the laboratory with a known sequence that recognize complementary sequences in $DNA$.

The basis of $DNA$ fingerprinting is:

Which technique is used for $DNA$ fingerprinting?

Matching sequence of $DNA$ between two evidences,one of the criminal with the suspect is known as: