Not all descendants of this mixture of peoples are included in the "pardo" category. Since racial classifications in Brazil are based on phenotype, rather than ancestry, a large part of the self-reported white population has African and Amerindian ancestors, as well as a great part of the Black population has large European and Native American contributions. Besides skin color, there are social factors that influence the racial classifications in Brazil, such as social class, wealth, racial prejudice and stigma of being Black, Mulatto or Amerindian.