DNA Marker Index information for Chromosome: Y Marker: F666.1Names and Aliases for this DNA Marker: F666.1, F666, rs751271639.Chromosome Position in hg38 Human Genome assembly1: 21822736.Chromosome Position in hg19 assembly2: 23968883 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.