Marie: I am no expert in DNA but from what I have read, a father's Y Chromosome is passed to his son's virtually unchanged. Based on this information we would be able to determine how many Sellers lines we are working with and which line a person is descended from. It is also able to tell an approximate time frame of the common ancestor. One web site I read indicated that at least 6 males would be needed for the research. DNA testing is not the total answer for genealogy but just one of the tools available to help sort out the past. The cost is expensive but not out of reach if we have enough people to volunteer. Tommy Sellars Thomas W. Sellars, CPA HEREFORD, LYNCH, SELLARS & KIRKHAM, P.C. Tel (936) 756-8127 Ext 203 Metro (936) 441-1338 Fax (936) 756-8132 Firm website: www.hlsk.com