DNA Marker Index information for Chromosome: M Marker: B4a1a1m'Names and Aliases for this DNA Marker: B4a1a1m', B4a1a1-C151T, B4a1a1-a.Chromosome Position in hg38 Human Genome assembly1: 151.Chromosome Position in hg19 assembly2: 151 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.