Blacks Pin Hope on DNA to Fill Slavery's Gaps in Family Trees

By AMY HARMON

All her life, Rachel Fair has been teased by other black Americans about her light skin. "High yellow," they call her, a needling reference to the legacy of a slave owner who, she says, "went down to that cabin and had what he wanted."

So it was especially satisfying for Ms. Fair, 64, when a recent DNA test suggested that her mother's African ancestry traced nearly to the root of the human family tree, which originated there 150,000 years ago.

"More white is showing in the color, but underneath, I'm deepest Africa," said Ms. Fair, a retired parks supervisor in Cincinnati. "I tell my friends they're kind of Johnny-come-latelies on the DNA scale, so back up, back up."