DNA Marker Index information for Chromosome: Y Marker: S20591Names and Aliases for this DNA Marker: S20591.1, S20591, rs905870807, S20591.2, S20591.3.Chromosome Position in hg38 Human Genome assembly1: 15964901.Chromosome Position in hg19 assembly2: 18076781 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: T.