The firm Family Tree DNA (FTDNA) began selling DNA tests direct to the consumer in 2000. The company started out offering Y-chromosome DNA (Y-DNA) tests and mitochondrial (mtDNA) tests – the only two tests available in the early years. Y-DNA tracks the direct paternal line and mtDNA traces the direct maternal line. FTDNA is now the market leader for both Y-DNA and mtDNA testing, and the only company providing Y-DNA and mtDNA
