The study was conducted by using the genetic records of 148,739 European Americans who submitted a cheek swab for testing, says the study. Testing was also done on 5,269 self-described African Americans and 8,663 Latinos.
The study found "that people who were 15 percent African or less generally didn't describe themselves as African American, while those who were 50 percent African or greater almost universally did," Ingraham writes. "But in between there was a considerable amount of variation. Those who were about one quarter African were just as likely as not to call themselves African-American." (Read more) (Post map)