DNA Marker Index information for Chromosome: M Marker: B4b1a2a3Names and Aliases for this DNA Marker: B4b1a2a3.Chromosome Position in hg38 Human Genome assembly1: 8020.Chromosome Position in hg19 assembly2: 8020 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: T.