DNA Marker Index information for Chromosome: Y Marker: BY7891.1Names and Aliases for this DNA Marker: BY7891.1, BY7891, rs901922125.Chromosome Position in hg38 Human Genome assembly1: 20685906.Chromosome Position in hg19 assembly2: 22847792 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.