A biracial child would identify with both races. For instance, the child of a Caucasian mother and an African-American father would identify as someone who belongs to both of those races.
According the United States Census Bureau, the population of people who report multiple races, or are biracial, is growing at a faster rate than those who identify with one race. During the course of 10 years between 2000 and 2010, the multiple-race population grew by 32 percent compared to slightly more than 9 percent for people who identified with a single race.
The top four multiple-race groups include Caucasian and African-American, Caucasian and another race, Caucasian and Asian, and Caucasian and American Indian, which includes Alaskan Native.