A researcher believes that King Tut's lineage comes from his father, Akhenaten, and Nefertiti, Akhenaten's cousin. A 2010 study published in the Journal of the American Medical Association details a DNA analysis, from which scientists concluded that Tut's mother was likely Akhenaten' sister. However, researcher Marc Gabolde believes the DNA doesn't necessarily point to a sibling pair, but rather generations of first-cousin marriages. "The consequence of that is that the DNA of the third generation between cousins looks like the DNA between a brother and sister," Gabolde said. "I believe that Tutankhamun is the son of Akhenaten and Nefertiti, but that Akhenaten and Nefertiti were cousins."