Hi, Sheepers! Certain groups of people and some families are very interested in participating in DNA testing. This line of inquiry seems to be going on in several surname lists/digests. Any of you know how a DNA test determines if one has Native American ancestors? What is found in the blood sample that is so different from other ethnic groups or racial bloodlines - is there a certain 'marker' that is present? Very curious! Shirley: bobert@i-1.net