<prompt> DNA fingerprinting is based on possessing in DNA ofConstant tandem repeatVariable number tandem repeatsNon-repetative sequenceExon  <response>: These are tandem repeatsThese are sho sequence of DNA located at scattered sites The no. Of these repeat units varies from person to person but is it unique for paicular personProbability of similarity between two people is only 1 in 31010 personsRef: DM Vasudevan, 7th edition, page no: 637 