In the Original Study "Caveat Emptor: Genealogy for Sale," Jonathan Marks argues that current DNA tests are not very reliable because:​

A) ​they include people to whom you are not fully related
B) ​they always exclude maternal relatives after about twenty-five generations
C) ​they isolate a small percentage of your relatives because we are an inbred species
D) ​they only include relatives who descend from Europe and Africa

DNA Tests

Scientific tests that analyze genetic material to determine biological relationships, genetic disorders, ancestry, or personal traits.

Jonathan Marks

An anthropologist known for his work in the fields of genetics, anthropology, and the critical study of science, often questioning mainstream genetic explanations of human diversity.

Caveat Emptor

A legal principle meaning "let the buyer beware," implying that the buyer assumes the risk regarding quality or condition of the item purchased.