DNA Marker Index information for Chromosome: Y Marker: PH4774Names and Aliases for this DNA Marker: PH4774, BY1741, Y7930, rs749281903.Chromosome Position in hg38 Human Genome assembly1: 19168995.Chromosome Position in hg19 assembly2: 21330881 .Ancestral marker allele value: A.Derived, alternative, or mutated marker allele value: T.