DNA Marker Index information for Chromosome: Y Marker: Z20438.1Names and Aliases for this DNA Marker: Z20438.1, Z20438, rs555137895.Chromosome Position in hg38 Human Genome assembly1: 20616615.Chromosome Position in hg19 assembly2: 22778501 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.