DNA Marker Index information for Chromosome: Y Marker: B668Names and Aliases for this DNA Marker: B668, FT310416, rs775287303.Chromosome Position in hg38 Human Genome assembly1: 3026560.Chromosome Position in hg19 assembly2: 2894601 .Ancestral marker allele value: T.Derived, alternative, or mutated marker allele value: C.