AncestryDNA is a subsidiary of Ancestry LLC. AncestryDNA offers a direct-to-consumer genealogical DNA test. Consumers provide a sample of their DNA to the company for analysis. AncestryDNA then uses DNA sequences to infer family relationships with other Ancestry DNA users and to provide what it calls an "ethnicity estimate". This "ethnicity estimate" uses 700,000 markers which is only about .02% of all genetic markers that could be tested. Customers should not believe they are seeing all of their ethnic background, but taking multiple tests is useful when combined with using ancestry.com's genealogy web searches to find possible unexpected admixtures. Previously, Ancestry.com also offered paternal Y-chromosome DNA and maternal mitochondrial DNA tests, but those were discontinued in June 2014. The company describes the technical process of testing in a scientific white paper. In July 2020, the company claimed that their database contained 18million completed DNA kits bought by customers.