Generally, a genealogical DNA test might use either autosomal STRs or autosomal SNPs. (STR's are Short Tandem Repeats; SNPs are single-nucleotide polymorphisms.) However, testing companies do not currently offer autosomal STRs tests that use enough STR markers for genealogy.here are three types of genealogical DNA tests, autosomal (atDNA), mitochondrial DNA (mtDNA), and Y-Chromosome (Y-DNA). Autosomal tests for all ancestry. Y-DNA tests a male along his direct paternal line.
Definition of drifter for English Language Learners. : a person who moves from one place or job to another without a purpose or plan.
Related words. 1  drift noun. 2  drift off phrasal verb. 3  drift net noun.  drift apart phrasal 1  verb. continental drift noun.  the North Atlantic 1  Drift. 1. to be pushed along very slowly by the movement of air or water The boat started to drift out to sea. Thick smoke drifted across the  town.