DNA Marker Index information for Chromosome: Y Marker: L681Names and Aliases for this DNA Marker: L681, MF793391, rs768315477.Chromosome Position in hg38 Human Genome assembly1: 19741891.Chromosome Position in hg19 assembly2: 21903777 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: G.