Does everyone have black in them?

Answer 1

In short, yes. Every living person today descends from a single female Homo sapiens sapiens who lived in the area of East Africa, some 152,000 to 234,000 years ago. This has been determined by tracing mitochondrial DNA (the nonrecombinant DNA that is passed from mother to offspring, and so on, unchanged by anything other than mutation. This female is referred to as Mitochondrial Eve, and could have been of no other anthropological group than Congoid (sub-saharan African).

Answer 2

Although an odd way to ask the question, it seems clear what is being asked here. Short answer, in the vein of the question, yes.
Every single human on the planet has the same DNA. Some alleles may be different, more dominant or more recessive, but genetically, there is no difference between a Caucasian, an Oriental, or any of the other ethnotypes. We all have the same blood, bones, organs, chemical make-up, organic chemistry, and every other element that makes us humans.

Answer 3

Yes, in a way. Genetic studies and fossil evidence show that archaic Homo sapiens evolved to anatomically modern humans solely in Africa, between 200,000 and 60,000 years ago.