Not entirely.
100% blacks from Africa are usually considered 100% homo sapien. However some geneticists disagree and say that upwards of 13% in certain tribes consist of pre-homo sapien dna from various species. Supposedly there are so many different archaic species in the genetic admixture of Africans that there are more genetic differences between the various African tribes than the rest of the world together i.e. Asians and whites are more similar than Khoi San and Dinka. According to the geneticists who believe in the archaic admixture of Africans, the closest to a 100% Homo sapiens would be the Bantu as they show none of the other archaic human genes that the rest of the world do not have. As far as what archaic species are mixed in with the Africans apparently it is several different depending on the area and they are genetically weaker and disappear when distant tribes intermarry (ie if someone from Tribe A has 10% human 1 and 2% human 2 in their genes and someone from Tribe B has 2% human 1 and 10% human 2 in their genes then the offspring doesn't usually have 6% of human 1 and 2, but usually 2%. Since most of the archaic human admixtures are not favored genetically, most African Americans/American blacks which at the very least usually have multiple African tribes and quite frequently if not always have a percentage of European blood (the average self-identified "black" American not "mixed" in a study was found to be only 79.4% African) then the archaic human portion is usually gone or barely present plus they have a small percentage of Neanderthal from the whites as that is hot genetically disfavored but has survived tens of thousands of years of mixing.
Whites from Europe are about 2-5% Neanderthal depending on the person.
Asians and Native Americans have about 2-6% Neanderthal with the average Asian having 20% more Neanderthal on average than whites. But Asians have more than Neanderthal in them, they have on average 1-7% Denisovan a non homo sapien human species we only know from incomplete skeletons and no cultural or technological remnants. East Asians and Native Americans have the least Denisovan while the Pacific Islanders can be over 7%.
It wasn't just Homo sapiens doing the mixing either. Apparently the Denisovans shared between 1-17% of its genes with Neanderthals and a fairly decent about with the Heidelbergis.
So are we all the same species? Not according to most geneticists. We're all primarily homo sapien but most of us (at least those of us not 100% Bantu) have a little something extra in there as well. I'm a little over an 8th Native American and rest European about half of which is German and the other half Norman/Scots so I have a fair amount of Neanderthal and a very small amount of Denisovan. So I've got at least three species pumping through my veins.
