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What do the DYS, DYZ, and DYF prefixes on Y-DNA STR names mean?

April 26, 2017dys mean names prefixes str Y-DNA

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What do the DYS, DYZ, and DYF prefixes on Y-DNA STR names mean?

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The DYS, DYZ, or DYF prefixes are part of the scientific name for a short tandem repeat (STR) found on the Y-chromosome. STR markers are named according to guidelines published by the HUGO Gene nomenclature committee. For Y-DNA STR tests: D stands for DNA.Y stands for Y-chromosome.S, Z, or F stands for the complexity of the repeat segment. S is a unique segment.Z is a number of repetitive segments at one site.F is a segment that has multiple copies on the Y-chromosome.All STRs are given a unique identification number. For example, DYS393 is a DNA segment on the Y-chromosome. The S indicates that it is a unique segment. It was given the number 393 as an identifier.