DNA Marker Index information for Chromosome: Y Marker: Z16981Names and Aliases for this DNA Marker: Z16981, Y4756, rs1326738555.Chromosome Position in hg38 Human Genome assembly1: 21653763.Chromosome Position in hg19 assembly2: 23815649 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: G.