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.
Definition of drift for Students. 1  1 : the slow movement of something carried by wind or water. 2  2 : a pile of something that has been blown by the wind a drift of snow. 3  3 : a course something appears to be taking the drift of the conversation. 4  4 : the meaning of something said or implied I don't get your drift.