DNA Marker Index information for Chromosome: Y Marker: Z16423Names and Aliases for this DNA Marker: Z16423, Y4858, rs745392503.Chromosome Position in hg38 Human Genome assembly1: 19541991.Chromosome Position in hg19 assembly2: 21703877 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: A.