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Genetic-Fingerprint or DNA-profiling DNA profiling is only possible because we have within the non-coding regions between genes short sequences of bases called core sequences. They repeat themselves over and over again (up to 100 times). These repeated regions of DNA are called minisatellites (or variable number tandem repeats), and each individual has different numbers of repeated core sequences. DNA-profiling is based on two observations: - The number of repeats of a core sequence tends to vary considerably from person to person (the greater the no. of repeats, the longer the minisatellites, therefore each individual has different sized minisatellites). - Each individual has 50-100 different types of minisatellites made from different core sequences. It is almost impossible to find two individuals having matching minisatellites all of the same length (only they would be identical twins), there is only the chance to find very similar minisatellites. Therefore it is important to choose some that show the...

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