DNA Marker Index information for Chromosome: Y Marker: Y20903.4Names and Aliases for this DNA Marker: Y20903.4, FGC44943.4, rs1025531190.Chromosome Position in hg38 Human Genome assembly1: 20991388.Chromosome Position in hg19 assembly2: 23153274 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.