DNA fingerprinting is based on possessing in DNA of -
Variable number of tandem (one after another) repeats (VNTR), is unique for any individual & therefore serves as molecular DNA fingerprint. VNTR may be short tandem (microsatellite) or large tandem (minisatellite) repeats.
Constant Tandem Repeat
Variable Number Tandem Repeats (VNTR)
Non-repeatative sequence
Exon