Fossil and genetic data support the hypothesis that there was gene-flow both between modern and archaic populations, and between geographic groups of modern humans after their emergence. … Africa is central to both single origin and multiregional models of modern human origin.
What evidence is used to support the Out of Africa hypothesis?
Now a study of characteristic DNA sequences called “markers” in the Y chromosome adds support to the Out of Africa hypothesis. When scientists sequenced DNA from the mitochondria of a Neandertal 4 years ago, they found that it was very different from that in living humans.
What is the Out of Africa theory based on?
The first theory, known as the ‘Out of Africa’ model, is that Homo sapiens developed first in Africa and then spread around the world between 100 and 200,000 years ago, superseding all other hominid species. The implication of this argument is that all modern people are ultimately of African descent.
What evidence supports the theory that human life began on the continent of Africa?
Scientific techniques, ranging from fossil identification, radiocarbon dating and analysis of DNA – the human genetic blueprint passed down from one generation to the next – all support the notion that Africa, and in particular the eastern and southern regions, is the cradle of humankind.
What two lines of evidence provide strong support the Out of Africa hypothesis?
Fossil and genetic data support the hypothesis that there was gene-flow both between modern and archaic populations, and between geographic groups of modern humans after their emergence.
What are the 3 out of Africa models?
The ‘Out of Africa’ (Replacement), ‘Multiregional Evolution’ (Continuity), and ‘Assimilation’ models are the three most widely used to interpret the origin of living human populations (Figure 2; Gibbons 2011).