Hair color variation in Sub Saharan Africans? Why? [Archive] - The Apricity Forum: A European Cultural Community

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Hoihey

08-28-2020, 03:38 AM

https://i.ibb.co/QkjK3sk/8-FC49442-8-E60-4929-BF8-F-CB084-FF46343.jpg (https://ibb.co/RN4DkLN)
https://i.ibb.co/9rc0y36/2-F3-F2236-D0-C9-4-CC9-A33-A-1661-D6-B04-BE6.jpg (https://ibb.co/nL6yQ89)
https://i.ibb.co/VSNqZLB/5-DDF2-FCB-73-FA-423-D-8836-9-A7-C10-D4-F409.jpg (https://imgbb.com/)
https://i.ibb.co/RCPFgPn/2-CAEC5-B2-17-C1-41-A5-A732-242-D04926-A22.jpg (https://imgbb.com/)
https://i.ibb.co/ZfNSY3D/A4121-CEA-BBF6-4-A5-A-A4-AC-F57-C28-EE2-FE6.jpg (https://imgbb.com/)
https://i.ibb.co/VMmxZK1/A54-E35-A4-35-E7-4138-8527-E0-F4-FEB41-ACB.jpg (https://ibb.co/bNJFZf0)
https://i.ibb.co/TWChR2K/42172-F5-F-8456-4-B7-D-AB68-8-A25-F2626-FBA.jpg (https://ibb.co/dmhK6Mb)
https://i.ibb.co/x7TndXy/30132722-1-D14-4-C42-8769-5-EA28-DC4-E02-D.jpg (https://ibb.co/P6H20FR)
https://i.ibb.co/tZPJ9n7/3-EB0655-D-CB12-40-B5-AF18-DCA06-B490903.jpg (https://ibb.co/wJrzf89)

PaleoEuropean

08-28-2020, 04:21 AM

Because variation helps in sexual selection so that inbreeding does not occur.

Lucas

08-31-2020, 04:34 PM

Hoihey

08-31-2020, 10:07 PM

In most cases it is rather form of dying or dirt. Ligbrown haired black African?

Yeah actually, it surprised me a bit too but some of them really have a lighter hair color

https://www.youtube.com/watch?feature=emb_title&v=ONrHiL2ZOYo

Hamilcar

08-31-2020, 10:27 PM

they dyed their hair it's obvious

and in east africa and the sahel it's because of west eurasian admixture

Hoihey

08-31-2020, 11:22 PM

they dyed their hair it's obvious

and in east africa and the sahel it's because of west eurasian admixture

Nah man they didn’t dye shit, their poor and living in remote villages, where the fuck are they gonna get money to dye their hair? Or their kids hair?! Besides, you can see this phenomenon even in remote isolated Pygmy tribes who never had outside contact until relatively recently from Bantu migrants

https://i.ibb.co/rM8G44x/2-DFDC3-CD-F362-4-D54-A1-BD-1-FC9-B850-BDA8.jpg (https://imgbb.com/)
https://i.ibb.co/KzJrsJw/2250644-D-D29-C-4-F8-C-8-D2-A-686-C1-F737926.png (https://imgbb.com/)
https://i.ibb.co/NxjCJSK/83-C4-EBAC-D3-CE-49-D8-8-D41-C1608-FD7-B4-DC.jpg (https://ibb.co/VVS9zmT)

Hamilcar

08-31-2020, 11:41 PM

Nah man they didn’t dye shit, their poor and living in remote villages, where the fuck are they gonna get money to dye their hair? Or their kids hair?! Besides, you can see this phenomenon even in remote isolated Pygmy tribes who never had outside contact until relatively recently from Bantu migrants

https://i.ibb.co/rM8G44x/2-DFDC3-CD-F362-4-D54-A1-BD-1-FC9-B850-BDA8.jpg (https://imgbb.com/)
https://i.ibb.co/KzJrsJw/2250644-D-D29-C-4-F8-C-8-D2-A-686-C1-F737926.png (https://imgbb.com/)
https://i.ibb.co/NxjCJSK/83-C4-EBAC-D3-CE-49-D8-8-D41-C1608-FD7-B4-DC.jpg (https://ibb.co/VVS9zmT)

wtf they all have the same kind of hair color are you blind ?

Hoihey

09-01-2020, 12:13 AM

wtf they all have the same kind of hair color are you blind ?

Please take the time to look at each persons hair, 1 second for each person should suffice. Then get back to me.

El_Abominacion

09-01-2020, 12:15 AM

Nah man they didn’t dye shit, their poor and living in remote villages, where the fuck are they gonna get money to dye their hair? Or their kids hair?!

You realise it's traditional and they don't use L'Oréal right? Tribes like the Mundari and Hamar dye their hair using cattle urine, clay, ash etc. It goes way back

Adamm

09-01-2020, 12:49 AM

Sub Saharan Africans with brown hair isn't rare at all.

dududud

09-03-2020, 04:24 PM

Mostly they are dark brown, but there can be I guess a few individuals with dark or light chesnut, or medium browns hair.

I only see in the photos a few individuals with dark brown hair and some light ones (chesnut), otherwise the majority are dark brown, almost black.

Regarding hair pigmentation, one should not really ask the opinion of an individual of Apricity, because the majority have an Anglo-Saxon taxonomy (even when they live in non-Anglo-Saxon countries), so that they can confuse dark brown with chesnut (dark or light) color, even when the two colors are still different, but hey.

sailormoon

09-03-2020, 09:23 PM

SLC24A5 is found in as much as 50% in some Ethiopian groups. The SLC24A5 allele has maintained a substantial frequency in the Semitic-Cushitic populations, driven by social factors including sexual selection. This variant was probably brought to eastern Africa by people migrating from the Middle East. Its two neighboring genes, HERC2 and OCA2, are common in the light-skinned San people. The following paper proposes that these variants arose in Africa as early as 1 million years ago and spread later to Europeans and Asians.

African genomics and skin color
Skin color varies among human populations and is thought to be under selection, with light skin maximizing vitamin D production at higher latitudes and dark skin providing UV protection in equatorial zones. To identify the genes that give rise to the palette of human skin tones, Crawford et al. applied genome-wide analyses across diverse African populations (see the Perspective by Tang and Barsh). Genetic variants were identified with likely function in skin phenotypes. Comparison to model organisms verified a conserved function of MFSD12 in pigmentation. A global genetic panel was used to trace how alleles associated with skin color likely moved across the globe as humans migrated, both within and out of Africa.

RESULTS
We observe extensive variation in skin pigmentation in Africa, with lowest melanin levels observed in southern African San hunter-gatherers and highest levels in East African Nilo-Saharan pastoralists. A genome-wide association study (GWAS) of 1570 Africans identified variants significantly associated with skin pigmentation, which clustered in four genomic regions that together account for almost 30% of the phenotypic variation.

The most significantly associated single-nucleotide polymorphisms were at SLC24A5, a gene associated with pigmentation in Europeans. We show that SLC24A5 was introduced into East Africa >5 thousand years ago (ka) and has risen to high frequency.

The second most significantly associated region is near the gene MFSD12. Using in vitro and in vivo analyses, we show that MFSD12 codes for a lysosomal protein that modifies pigmentation in human melanocytes, with decreased MFSD12 expression associated with darker pigmentation. We also show that genetic knockout of Mfsd12 affects pigmentation in mice.

A third highly associated region encompasses a cluster of genes that play a role in ultraviolet (UV) response and DNA damage repair. We find the strongest associations in a regulatory region upstream of DDB1, the gene encoding damage-specific DNA binding protein 1, and that these variants are associated with increased expression of DDB1. The alleles associated with light pigmentation swept to near fixation outside of Africa due to positive selection, and we show that these lineages coalesce ~60 ka, corresponding with the time of migration of modern humans out of Africa.

The fourth significantly associated region encompasses the OCA2 and HERC2 loci. We identify previously uncharacterized variants at HERC2 associated with the expression of OCA2. These variants arose independently from eye and skin pigmentation–associated variants in non-Africans. We also identify variants at OCA2 that are correlated with alternative splicing; alleles associated with light pigmentation are correlated with a shorter transcript, which lacks a transmembrane domain.

CONCLUSION
We identify previously uncharacterized genes and variants associated with skin pigmentation in ethnically diverse Africans. These genes have diverse functions, from repairing UV damage to playing important roles in melanocyte biology. We show that both dark and light pigmentation alleles arose before the origin of modern humans and that both light and dark pigmented skin has continued to evolve throughout hominid history. We show that variants associated with dark pigmentation in Africans are identical by descent in South Asian and Australo-Melanesian populations. This study sheds light on the evolutionary history, and adaptive significance, of skin pigmentation in humans.

https://science.sciencemag.org/content/358/6365/eaan8433