DNA Marker Index information for Chromosome: Y Marker: M266Names and Aliases for this DNA Marker: M266, M6643, V2772, rs9341307.Chromosome Position in hg38 Human Genome assembly1: 12919003.Chromosome Position in hg19 assembly2: 15030915 .Ancestral marker allele value: T.Derived, alternative, or mutated marker allele value: C.