Why DNA? 5 Case Studies The link below goes to an article by Susan Meates published in the bookzine Discover your Ancestors. The article covers a brief review of DNA testing options, and then five(5) case studies are presented showing how to use DNA testing. These case studies are actual research situations and the actual DNA results. One case study involves adoption. The article includes photographs providing an exclusive look inside the lab at Family Tree DNA. Link: Article_DYA_2016_Why_DNA.pdf.