Quote Originally Posted by gilmore View Post
Family Tree DNA. It has the largest database. I then entered the Y DNA results at www.ysearch.org and the mt DNA results at www.mitosearch.org
The reason I ask is because my family members have tested with different companies at different times, to match profiles. Two companies, FamilyTreeDNA, and EthnoAncestry, were testing for different profiles, but used some of the same markers, each coming up with different values for the markers that they both happened to be testing with.

With something like DNA, there's no possible way that I could check the work myself, so I wonder if one or both of the services got it wrong.