Mixed Race Studies

Large DNA Study Traces Violent History of American Slavery

The New York Times
2020-07-23

Christine Kenneally

An 1823 cross-section diagram of a ship used to carry enslaved people. incamerastock/Alamy

Scientists from the consumer genetics company 23andMe have published the largest DNA study to date of people with African ancestry in the Americas.

More than one and a half centuries after the trans-Atlantic slave trade ended, a new study shows how the brutal treatment of enslaved people has shaped the DNA of their descendants.

The report, which included more than 50,000 people, 30,000 of them with African ancestry, agrees with the historical record about where people were taken from in Africa, and where they were enslaved in the Americas. But it also found some surprises.

For example, the DNA of participants from the United States showed a significant amount of Nigerian ancestry — an unexpected finding, as the historical record does not show evidence of enslaved people taken directly to the United States from Nigeria.

At first, historians working with the researchers “couldn’t believe the amount of Nigerian ancestry in the U.S.,” said Steven Micheletti, a population geneticist at 23andMe who led the study…

…The 23andMe project found this general pattern, but also uncovered a startling difference in the experience of men and women between regions in the Americas.

The scientists calculated that enslaved women in the United States contributed 1.5 times more to the modern-day gene pool of people of African descent than enslaved men. In the Latin Caribbean, they contributed 13 times more. In Northern South America, they contributed 17 times more.

What’s more, in the United States, European men contributed three times more to the modern-day gene pool of people of African descent than European women did. In the British Caribbean, they contributed 25 times more…

Read the entire article here.

Is race genetic?

Salon
2014-10-12

Laura Miller

Advances in genealogy and DNA analysis tell surprising and disturbing stories about the heritage we think we know

A bestselling European novelist, while on a recent American book tour, was approached by a woman clutching a manilla folder. “We’re related!” she told him, opening the folder to reveal old black and white photos, documents and a family tree. She pointed to a dour-looking 19th-century lady posing stiffly in a black dress and explained that this was her great-great-grandmother, the novelist’s great-great-great-aunt.

He was kind and patient, but clearly no more than mildly interested in the materials she treasured. Maybe he had more relatives than he knew what to do with back home. Maybe the whole thing was too reminiscent of the years when his homeland was occupied by a foreign power pathologically obsessed with establishing “pure” lineages. Or maybe he just believes in looking forward rather than back. He had, after all, books to sign, cities to visit and even more books to write once he got back, and perhaps defining himself by a future he can shape seems a lot more appealing than dwelling on the past he can’t.

Many Europeans see genealogy as a peculiarly American preoccupation — and of course billions of people in places like China view it merely as a human one, the way we make sense of our place in the world. Christine Kenneally, an Australian journalist and the author of “The Invisible History of the Human Race: How DNA and History Shape Our Identities and Our Futures,” has talked to adherents of both sides and has a lot of ideas about “what gets passed on,” as she puts it. Where Kenneally comes from, the “bad blood” of convicts transported from Britain to the antipodes was once regarded as a cause for shame, something best not talked about by their descendants. No longer: she recalls working on a school project in which her classmates happily dug up convict ancestors to boast about.

A good bit of “The Invisible History of the Human Race” is devoted to defending genealogy and the desire to know one’s lineage. Apparently, many historians look down on the amateur penchant for tracing family trees; it is not research but “mesearch,” too small-picture, too personal to constitute true scholarship. To the layperson, disproving this canard (which Kenneally does neatly) hardly seems a battle that demands to be fought, but when Kenneally takes up the subject of DNA and race, she enters more hotly contested territory. What does it mean to link the slippery concept of race to the scientific study of genetics and the historical facts that constitute an individual’s ancestry?…

…Henry Louis Gates, Jr. himself serves as an excellent example. He’s “black,” that is, African-American (as well as a professor of African-American Studies), although the aforementioned DNA analysis revealed that 60 percent of his genetic material is of European origin. Does this make him less black? Not on that infamous evening in 2009, when Gates was arrested by a white police officer in Cambridge, Massachusetts while attempting to enter his own house.

Yet what Gates learned about his genetic ancestry did change how he understood his identity, and he would later announce on “The Oprah Winfrey Show” that he and the officer who arrested him share a common ancestor in the Irish king, Niall of the Nine Hostages. That’s the gist of much of the genealogy- and genetics-based programming that Gates has hosted for the Public Broadcasting Service, shows like “African American Lives” and “Finding Your Roots”: We are all more connected than we realize…

Read the entire article here.