DNA Marker Index information for Chromosome: Y Marker: Z2021Names and Aliases for this DNA Marker: Z2021, CTS9901, rs777823204.Chromosome Position in hg38 Human Genome assembly1: 17017034.Chromosome Position in hg19 assembly2: 19128914 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.