Y-STR (Y-chromosome Short Tandem Repeat)

Y-STRs (Y-chromosome Short Tandem Repeats) are specific sequences of DNA on the Y chromosome consisting of short patterns of DNA that repeat multiple times. These repeats are inherited paternally, meaning they pass from father to son with little change over generations. Because of this, Y-STRs are useful for tracing male lineage and identifying males in forensic investigations. Variations in the number of repeats at these sites help distinguish individuals or lineages, making Y-STR analysis a powerful tool in genealogy, paternity testing, and criminal casework involving male individuals.