Sites within the human genome where a short nucleotide sequence is repeated many times in a row are known as short tandem repeats.
DNA sequences with 2 to 6 base pairs are known as short tandem repeats (STRs), and they are dispersed throughout the genome. Multiple repetitions of these brief sequences are possible, and the number of repetitions varies greatly between people. The capacity to distinguish one sample from another is made possible by the great variability.
The Y-STR method's primary benefit is its capacity to identify the male component even in severe male-to-female DNA mixes. The number of semen donors for combinations of two or more male persons can be determined using it, as well as for quickly screening a large number of stains.
Due to their occasionally poor biostatistical efficiency and the potential to detect one or more genetic discrepancies that might potentially be explained by mutational events, STRs have a few drawbacks when examining genetic links in deficient cases.
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