DNA Marker Index information for Chromosome: Y Marker: M11638.1Names and Aliases for this DNA Marker: M11638.1, M11638, rs556873281.Chromosome Position in hg38 Human Genome assembly1: 20018023.Chromosome Position in hg19 assembly2: 22179909 .Ancestral marker allele value: T.Derived, alternative, or mutated marker allele value: C.