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.
drift. 1  a being driven or carried along, as by a current of air or water or by circumstances. 2  the course on which something is directed or driven. 3  the deviation of a ship, airplane, rocket, etc. from its path, caused by side currents or winds. 4  the velocity of a current of water.