DNA Marker Index information for Chromosome: Y Marker: FGC21987Names and Aliases for this DNA Marker: FGC21987, rs1256241395.Chromosome Position in hg38 Human Genome assembly1: 19204551.Chromosome Position in hg19 assembly2: 21366437 .Ancestral marker allele value: T.Derived, alternative, or mutated marker allele value: C.