DNA Marker Index information for Chromosome: Y Marker: BY7774.1Names and Aliases for this DNA Marker: BY7774.1, BY7774, rs957491267.Chromosome Position in hg38 Human Genome assembly1: 7542757.Chromosome Position in hg19 assembly2: 7410798 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.