DNA Marker Index information for Chromosome: Y Marker: BTL60000021974Names and Aliases for this DNA Marker: BTL60000021974, Y322717, rs767257784.Chromosome Position in hg38 Human Genome assembly1: 20459910.Chromosome Position in hg19 assembly2: 22621796 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.