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DNA fingerprinting is a technology that identifies particular individuals using properties of their DNA It is also termed DNA profiling
In the past decade, the technique of DNA fingerprinting has become automated It is now done using PCR, which amplifies short tandem
repeat sequences (STRs) Like VNTRs, STRs are found in multiple sites in human
genomes and are variable among different individuals The main difference between a VNTR and STR is size
STRs are much shorter, usually 100–450 bp STRs are called microsatellites, and VNTRs minisatellites
The amplified STRs are fluorescently labeled They are separated by gel electrophoresis A laser excites the fluorescent molecule within the STR A detector records the amount of emission for each STR