DNA Marker Index information for Chromosome: M Marker: B4a1a1a23Names and Aliases for this DNA Marker: B4a1a1a23.Chromosome Position in hg38 Human Genome assembly1: 9734.Chromosome Position in hg19 assembly2: 9734 .Ancestral marker allele value: A.Derived, alternative, or mutated marker allele value: G.