"Even when people can choose their own race or can move across racial boundaries, that doesn't mean that race stops mattering," says [Andrew] Penner, a sociologist at the University of California, Irvine. "The hierarchy can maintain itself by reclassifying people but keep the stereotypes in place."

For the full story, please visit https://www.cnn.com/2018/03/02/us/racial-fluidity/index.html.