DNA Marker Index information for Chromosome: Y Marker: M4137.1Names and Aliases for this DNA Marker: M4137.1, M4137, rs557771923.Chromosome Position in hg38 Human Genome assembly1: 20515209.Chromosome Position in hg19 assembly2: 22677095 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.