The three kinds of DNA of use for family history research* Autosomal - what most of us use, via Ancestry , 23andMe , MyHeritage , FamilyTreeDNA Family Finder and LivingDNA Y - available from FamilyTreeDNA, Yseq and a few others Mt or mitochondrial - available from FamilyTreeDNA Autosomal DNA For autosomal DNA (AtDNA), to make best use of your results for research, you will "fish in all the ponds" by testing with Ancestry and 23andme since neither accept uploads, and then upload your raw data to Gedmatch , MyHeritage and FamilyTreeDNA, which do accept uploads - for free!  The value of autosomal DNA testing is that it covers all of your ancestry back four generations or so, and up to six or seven generations, which is quite long ago. However, as your matches are ever smaller as you go further back in time, your AtDNA will not take you back to your deep ancestry before surnames and record keeping. Y and Mt DNA Both Y and Mt DNA will take you back very f...