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 RETARDANTS. Drift is a function of drop size. Drops with diameters of 100 microns (0.1 mm) or less contribute the bulk of the drift off site from the treated fields. Chemicals that increase the viscosity and the tensile strength of water will decrease the proportion of these smaller drops in a spray system.