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Short tandem repeat

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A short tandem repeat (STR) in DNA occurs when a pattern of two or more nucleotides are repeated and the repeated sequences are directly adjacent to each other. An STR is also known as a microsatellite. The pattern can range in length from 2 to 16 base pairs (bp) and is typically in the non-coding intron region. A short tandem repeat polymorphism (STRP) occurs when homologous STR loci differ in the number of repeats between individuals. By identifying repeats of a specific sequence at specific locations in the genome, it is possible to create a genetic profile of an individual. Autosomal STR analysis has become the prevalent analysis method for determining genetic profiles in forensic cases. Y-chromosome STRs (Y-STRs) on the Y chromosome) are used in genealogical DNA testing in surname DNA projects.

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GNU head This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Short tandem repeat".