Our goal is to use genetic genealogy to prove or disprove connections not found through traditional genealogical research.  DNA testing has advanced to the point that one can order tests at the 12, 25, 37, 67 and 111 marker levels and specific SNP testing.  It is suggested that one begins testing with a minimum 25-marker test.  Matches at the 12 marker level are mainly useful as a rough test of other genealogical findings, in that, a negative result can definitely rule out a suspected match.  The tests at 37 markers or more are more useful for suggesting possible relationships. A good match at these levels suggest the existence of a common ancestor.