DNA Marker Index information for Chromosome: M Marker: X2a'b'j'Names and Aliases for this DNA Marker: X2a'b'j', X2-G225A, X2-a.Chromosome Position in hg38 Human Genome assembly1: 225.Chromosome Position in hg19 assembly2: 225 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.