البرنامج_اللائحة_التقرير السياسي المجازين من المؤتمر الخامس للحزب الشيوعي السوداني(كلاكيت تاني)

Quote: Race and ethnicity For more details on this topic, see Race (classification of human beings), Race and genetics, Historical definitions of race, and Ethnic group. Humans often categorize themselves in terms of race or ethnicity, sometimes on the basis of differences in appearance. Human racial categories have been based on both ancestry and visible traits, especially skin color, hair texture and facial features. The patterns of human genetic variation, however, correspond poorly with visible morphological differences.[79] Most current genetic and archaeological evidence supports a recent single origin of modern humans in East Africa.[80] Current genetic studies have demonstrated that humans on the African continent are most genetically diverse.[81] However, compared to many other animals, human gene sequences are remarkably homogeneous.[82][83][84][85] The predominance of genetic variation occurs within "racial groups", with only 5 to 15% of total variation occurring between groups.[86] Ethnic groups, on the other hand, are more often linked by linguistic, cultural, ancestral, and national or regional ties. Self-identification with an ethnic group is based on kinship and descent. Race and ethnicity can lead to variant treatment and impact social identity, giving rise to racism and the theory of identity politics.