Why are Amerindians dark?

[FilleDuRoi]

Deleted.

[FilleDuRoi]

The first humans were light-skinned or light brown. There was probably a desert region in Southern Asia that caused Indian Caucasians and Mongolians (C3) to have more dark skin.
There are no white skin genes it is only minor melanin.

To by knowledge there was a separate selection for lighter skin in Northeast Asia and that Northeast Asians have lighter skin than the original Homo sapiens.

Southeast Asians with their more medium brown skin are similar to the original Homo sapiens in skin color while Northeast Asians have lighter brown skin with more sallow tones. The lighter skin in Northeast Asians is associated with various SNPs on the OCA2 such as rs1800414, while OCA2 is not associated with the skin color difference between Africans and Europeans. The two variant alleles most associated with the skin color difference between Europeans and Africans are of SNP rs1426654 on SLC24A5 and SNP rs1426654 on SLC45A2. These alleles date back at the least 20,000 years after East Eurasians became genetically distinguished from West Eurasians.

[luc2112]

To by knowledge there was a separate selection for lighter skin in Northeast Asia and that Northeast Asians have lighter skin than the original Homo sapiens.

Southeast Asians with their more medium brown skin are similar to the original Homo sapiens in skin color while Northeast Asians have lighter brown skin with more sallow tones. The lighter skin in Northeast Asians is associated with various SNPs on the OCA2 such as rs1800414, while OCA2 is not associated with the skin color difference between Africans and Europeans. The two variant alleles most associated with the skin color difference between Europeans and Africans are of SNP rs1426654 on SLC24A5 and SNP rs1426654 on SLC45A2. These alleles date back at the least 20,000 years after East Eurasians became genetically distinguished from West Eurasians.

Just look at the khoisan (haplogroupo A the first and predecessor of all) they are not dark:

[Token]

What i find interesting is that in prehistory there wasn't any obvious correlation between light skin and cold climates. People living in glacial climatic conditions were more often than not darker than people living in the sunny Near East. Present-day Europeans, for example, are mostly descended from people that lived in the steppes between the Don and the Caspian since the Mesilithic, which isn't a particularly cold region, yet they are the palest people in the world. In Mesolithic Europe, light haired and light skinned groups of hunter gatherers often lived side by side with dark-skinned and dark haired groups in the same climatic conditions. To me it seems like light skin and light hair becoming more prevalent in certain ancestral populations had more to do with probability than anything.

[luc2112]

Amerindians can be as light as East Asians sometimes. The trait shows up actually, it's not uncommon. I believe it's from our arctic dwelling ancestors. Luckily we evolved darker skin as our ancestors spread out in the Americas.

There was a study published last year on why some Latin Americans have light skinned, it revealed it's because of their Native American ancestors and not always from their European side.

https://www.sciencemag.org/news/2019...ave-light-skin.

The mutation of skin color happened in asia and not in america and they came as modern human beings. Mayans are a mixture of Q3-M3 (+ -50%) and C3.
C3 carries some primitive haplogroup like B.

[Synapsid]

Amerindians can be as light as East Asians sometimes. The trait shows up actually, it's not uncommon. I believe it's from our arctic dwelling ancestors. Luckily we evolved darker skin as our ancestors spread out in the Americas.

There was a study published last year on why some Latin Americans have light skinned, it revealed it's because of their Native American ancestors and not always from their European side.

https://www.sciencemag.org/news/2019...ave-light-skin.

Interesting. Do you believe that the original Amerind were lighter than ethnic Mayans?

[Synapsid]

What i find interesting is that in prehistory there wasn't any obvious correlation between light skin and cold climates. People living in glacial climatic conditions were more often than not darker than people living in the sunny Near East. Present-day Europeans, for example, are mostly descended from people that lived in the steppes between the Don and the Caspian since the Mesilithic, which isn't a particularly cold region, yet they are the palest people in the world. In Mesolithic Europe, light haired and light skinned groups of hunter gatherers often lived side by side with dark-skinned and dark haired groups in the same climatic conditions. To me it seems like light skin and light hair becoming more prevalent in certain ancestral populations had more to do with probability than anything.

EHG is decedants of Paleothic siberians tho

[FilleDuRoi]

Just look at the khoisan (haplogroupo A the first and predecessor of all) they are not dark:

Exactly. There was selection for darker skin in most Africans, with the original skin tone being comparable to medium brown the Khoi-San people. Northeast Asians are slightly lighter skinned with more of a sallow tone. Southeast Asians have a similar skin tone to the Khoi-San.

My point is that Mongoloids did not undergo selection for darker skin like Africans did.

[luc2112]

In southern Eurasia they probably had to mutate for greater melanin production or they would not survive:

[luc2112]

Exactly. There was selection for darker skin in most Africans, with the original skin tone being comparable to medium brown the Khoi-San people. Northeast Asians are slightly lighter skinned with more of a sallow tone. Southeast Asians have a similar skin tone to the Khoi-San.

My point is that Mongoloids did not undergo selection for darker skin like Africans did.

There was no selection, but a mutation, those who did not mutate in a desert climate died (life was like that for the first low IQ humans)