Individual Y-chromosome STR locus allele frequencies and gene diversity values were determined for 48 Y-STR loci (DYS444; DYS450; DYS458; DYS481; DYS485; DYS490; DYS494; DYS495; DYS497; DYS503; DYS505; DYS508; DYS510; DYS511; DYS520; DYS521; DYS525; DYS533; DYS534; DYS535; DYS540; DYS543; DYS551; DYS552; DYS556; DYS562; DYS572; DYS578; DYS591; DYS593; DYS596; DYS617; DYS622; DYS627; DYS630; DYS631; DYS634; DYS636; DYS638; DYS641; DYS643; DYS657; DYS660; DYS685; DYS688; DYS698; DYS703; DYS707). Data was obtained from a sampling of 198 male individuals, from the Caucasian American (n=98) and African American (n=100) populations.