DNA Marker Index information for Chromosome: Y Marker: BY641Names and Aliases for this DNA Marker: BY641, Z29601, rs1022985564.Chromosome Position in hg38 Human Genome assembly1: 19239288.Chromosome Position in hg19 assembly2: 21401174 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: T.