Most Rh- Africans are not truly Rh- II Rhesusnegative.net 11 months ago Most Rh- Africans are not truly Rh- Tribes with truly Rh- blood, tend to get it from North African, European and West Asian ancestors. 14% Rh- in Mali: Who are the Dogon people? Neanderthal DNA discovered within the Yoruba people of Africa 21.32 percent of Ethiopian “highlanders” in Gambella found to be Rh negative