Medical Genetics Microsatelite NA Microsatellite dna differs from minisatellite DNA in that the repeat units are less than 5bp in length for example (tgn or (Aat)n. These microsatellites are highly polymorphic in the length of their repeat arrays and so they can also be used in forensic analysis, as well as to identify related groups of individuals within populationsMedical Genetics Microsatellite DNA Microsatellite DNA differs from minisatellite DNA in that the repeat units are less than 5bp in length for example (TG)n or (AAT)n. These microsatellites are highly polymorphic in the length of their repeat arrays and so they can also be used in forensic analysis, as well as to identify related groups of individuals within populations