DNA Marker Index information for Chromosome: Y Marker: S20171.1Names and Aliases for this DNA Marker: S20171.1, S20171.Chromosome Position in hg38 Human Genome assembly1: 15653119.Chromosome Position in hg19 assembly2: 17764999 .Ancestral marker allele value: A.Derived, alternative, or mutated marker allele value: G.