>>23514270 (lb) about Irish
Here’s a piece you’re missing.
There are two types of melanin. NOT one. And each type is produced by a significantly different and unrelated gene.
Eumelanin gives black and brown shades. And this first type is pushed to the front and just called ‘melanin’. Eumelanin and its responsible gene has been around way longer. Most people of the world have Eumelanin.
The second type of melanin is pheomelanin. A minority of people have pheomelanin. Pheomelanin and its gene has only been around about 30-35000 years. When humans migrated into northern (less sun) zones, certain of the humans who went farthest north the longest lost their eumelanin gene altogether. Poof. Gone.
Well not poof- it was a much slower evolution as Eumelanin made survival difficult.
Around the same time as the Eumelanin gene vanished completely from northern peoples, they evolved a different gene that produces pheomelanin. This second type of melanin, pheomelanin, and its responsible gene gives red and yellow colorations.
Only albinos have no melanin. And the race is on to hide the fact that pheomelanin ever existed separately. A person now can carry both genes and types of melanin as the once very distinct evolved difference in genes has been admixtured as people began to travel and mingle a few thousand years ago. Interestingly enough, Viking travel took pheomelanin into Rus Viking (Russia) and other areas to the south as you track red hair (and pheomelanin. )
A super saturation of Eumelanin gives a very dark skinned individual with black hair and dark brown eyes. But get this- A super saturation of pheomelanin gives a ginger.
Is it coincidental for recent media and culture to make ‘ginger’ something to mock? Gingers are proof that pheomelanin is separate and distinct. They have a supersaturation of pheomelanin, and 0 Eumelanin.