DNA Marker Index information for Chromosome: Y Marker: BY21756Names and Aliases for this DNA Marker: BY21756, Z44793, rs1023041155.Chromosome Position in hg38 Human Genome assembly1: 8779008.Chromosome Position in hg19 assembly2: 8647049 .Ancestral marker allele value: T.Derived, alternative, or mutated marker allele value: A.