Biracial People

I know personally that it is difficult to identify with a race being a biracial person of white and black descent but how is it for people that have parents from two minorites? How do they relate to thier race and do they have the same challenges with identifying? I feel that they may be at less of an advantage becuase they would not have any oppututnity for white privelage at all unlike mixed children with a white parent. I feel that they would tryo to relate with one race the strongest and alomst reject the other but im sure that is not 100% correct. The idea of this really interests me