DYS (DNA)

DYS is short for DNA Y-chromosome Segment, and is used to designate a segment of DNA on the Y chromosome where a sequence of nucleotides repeats. These sequences are known as short tandem repeats (STRs), and are called markers in genealogical DNA testing. The possible variations of repeats at a DYS marker are known as alleles.

Related Topics:
DNA - Y chromosome - Nucleotide - Short tandem repeat - Genealogical DNA test - Allele

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DYS is often proceeded by the number sign (#), so the location 455 may be written as DYS455, DYS 455, DYS#455, or DYS# 455.

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