DNA may be the blueprint for the construction of organisms. There are 2 types of DNA: nuclear and mitochondrial.
This article discusses what DNA tests are and how they function, and it critiques many of the DNA tests https://hassanfuax756666.jasperwiki.com/6184043/top_latest_five_backed_by_years_of_research_and_a_team_of_top_notch_experts_urban_news