DNA Marker Index information for Chromosome: M Marker: B4a1a1a20Names and Aliases for this DNA Marker: B4a1a1a20.Chromosome Position in hg38 Human Genome assembly1: 11016.Chromosome Position in hg19 assembly2: 11016 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.