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.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  drift(Noun) The act or motion of drifting; the force which impels or drives; an overpowering influence or impulse. 2  drift(Noun) A place, also known as a ford, along a river where the water is shallow enough to permit oxen or sheep to be driven to the opposite side.