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Author Topic: In prehistory, was Africa mono- or poly-racial?
Frankly Kemet
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The consensus today is Africa has the most diverse population, genetically and phenotypically (race). Did this fact apply to Africa in prehistoric times?
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lamin
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Th OOA theory proves the point that homo sapiens in Africa was mono-racial at the point of some humans migrating out of Africa some 70,000 years ago. Wolpoff's multi-regional hypothesis has bitten the dust.
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Frankly Kemet
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quote:
Originally posted by lamin:
Th OOA theory proves the point that homo sapiens in Africa was mono-racial at the point of some humans migrating out of Africa some 70,000 years ago. Wolpoff's multi-regional hypothesis has bitten the dust.

okay. But I don't think it is enough necessarily to invalidate multiregional hypothesis
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Ish Gebor
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quote:
Originally posted by Frankly Kemet:
The consensus today is Africa has the most diverse population, genetically and phenotypically (race). Did this fact apply to Africa in prehistoric times?

Enjoy,

Brenna Henn on panmixia.

CARTA: Ancient DNA and Human Evolution – Brenna Henn: The Origins of Modern Humans in Africa

Brenna Henn (Stony Brook Univ) explores patterns of genetic diversity across Africa and models for modern human origins in this talk. She discusses whether genetic data is concordant with archaeological data and suggests directions for future research. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 30979]


https://youtu.be/mWwmVXZOFbU


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quote:
Colored dots indicate genetic diversity. Each new group outside of Africa represents a sampling of the genetic diversity present in its founder population. The ancestral population in Africa was sufficiently large to build up and retain substantial genetic diversity.
--Brenna M. Henna,
L. L. Cavalli-Sforzaa,1, and
Marcus W. Feldmanb,2
Edited by C. Owen Lovejoy, Kent State University, Kent, OH, and approved September 25, 2012 (received for review July 19, 2012)

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Ish Gebor
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quote:
"More generally, it has often been suggested that there is an extant tropical belt of human populations that anatomically resemble sub-Saharan Africans (with 'racial' features such as very dark skin, curly hair and so on). They include some southern Indians, the Andamese, the so-called Negritos of the Phillipines (Aeta/Agta) and the Malay Penisula (Semang), Papuans and Aboriginal Australians. These people, it as suggested, might be the survivors of a 'southern coastal route' from the Horn of Africa along the tropical coastline through to Southeast Asia and Australia (Nei and Roychoudhury 1992). The bulk of EUrasian populations were then suggested to be the survivors if a 'northern route': out of Egypt into the 'Levantine corridor', and thence into both Europe and Asia (Lahr 1996).'"
-- Hans-Jürgen Bandelt et. 2006. EDS. Human Mitochondrial DNA and the Evolution of Homo sapiens. p. 234
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Tyrannohotep
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Population substructure in Africa is almost certainly ancient.

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I don't believe one could successfully group even all the sub-Saharan populations in a singular "race" (or population cluster, if you prefer) that is completely exclusive of their OOA brethren. The SSA label might be a convenient and familiar catch-all label for the African ancestry that's not endemic to North Africa, but that's all I personally see it as.

quote:
The pattern of DNA diversity is one of nested subsets, such that the diversity in non-Sub-Saharan African populations is essentially a subset of the diversity found in Sub-Saharan African populations. The actual pattern of DNA diversity creates some unsettling problems for using race as meaningful genetic categories. For example, the pattern of DNA diversity implies that some populations belong to more than one race (e.g., Europeans), whereas other populations do not belong to any race at all (e.g., Sub-Saharan Africans).
---Human DNA sequences: more variation and less race.
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Frankly Kemet
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Thanks for sharing.

quote:
Originally posted by Ish Gebor:
quote:
"More generally, it has often been suggested that there is an extant tropical belt of human populations that anatomically resemble sub-Saharan Africans (with 'racial' features such as very dark skin, curly hair and so on). They include some southern Indians, the Andamese, the so-called Negritos of the Phillipines (Aeta/Agta) and the Malay Penisula (Semang), Papuans and Aboriginal Australians. These people, it as suggested, might be the survivors of a 'southern coastal route' from the Horn of Africa along the tropical coastline through to Southeast Asia and Australia (Nei and Roychoudhury 1992). The bulk of EUrasian populations were then suggested to be the survivors if a 'northern route': out of Egypt into the 'Levantine corridor', and thence into both Europe and Asia (Lahr 1996).'"
-- Hans-Jürgen Bandelt et. 2006. EDS. Human Mitochondrial DNA and the Evolution of Homo sapiens. p. 234

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Ish Gebor
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^The above of course deals with the oldest dispersals.
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the lioness,
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quote:
Originally posted by Frankly Kemet:
[QB] The consensus today is Africa has the most diverse population, genetically and phenotypically (race).

You write " (race) " after phenotype
as if
race = phenotype

That is a questionable assumption

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