We're all DNA, but is Race more DNA, or more Environmental when talking about Racial Evolution?

DNA calculations estimate light skin was a very recent mutation, the Neanderthals were long gone extinct by the time it occured...

 

to be more precise sub-Saharan africa...there was Neanderthal feedback into N africa from europe and the middle-east..

 

ethnicity is just your family group...imagine a group of hunter gatherers continually inbreeding over hundreds of years, is it any surprise they all look alike? they're all family...a typical HG group is typically 25-50 individuals, when it gets to big they split up as HG food resources begin to be strained by a large group, over time this happens again and again and eventually you have a number of HG groups that still meet up and exchange members(DNA) but they all still have a family resemblance only now they're becoming clan or tribal group that's expanded over a large territory sharing culture/language=ethnicity...just a very big family, still all cousins.

those ethnic clans would reside in a region and as they were generally immobile and only infrequently came into contact with different ethnic groups they kept their family resemblance, DNA exchange with outside groups would be swallowed up by the larger group, their physical differences would disappear into the greater gene pool in a few generations...

ethnic groups eventually becoming todays nations...

 

having being tested my test came back as expected, solid northern european with the small Neanderthal contribution...but it also revealed Denisovan??? and Melanesian WTF! Melanesians apparently have the most Denisovan DNA of anyone, and my grandmothers family were early 19th century missionaries in Melanesia so it does fit...

 

Natural selection plays an important role in evolution. So there must be an advantage in skin color to survival in different climates. But then mutations...light skin people would die before breeding in warm climates and vice versa in cold climates. However this doesn't seem to be the case. So it may be that white skin and blue eyes are recent mutations. Or some other cause may be at work here.

 

yep, sexual attraction plays a huge part, or better known as natural selection

we choose who some animals have sex with and breed them in a way we choose to domesticate them as an example

 

it's possible, when the first lighter skin women were born, they may have been unique and many people of the time wanted to mate with them, increasing their genetics odds of survival

we see the black race lightening now even in America or you could say the white race becoming darker, so changes over time in skin color are possible

maybe eventually white people were not in favor and a small group of them moved out in a group of their own and populated from there

White people in the hot sun may of been considered a weaker race as they could not handle the sun as well, they would sun burn when out on hunts, ect..., thus society treated them as such, when they move to regions with less sun, they did much better, they would of been isolated and allowed to breed uninterrupted as black people did not prefer the cold environments during that time in history

thus both natural selection and environment would of played a roll

maybe something like the whiter race had a immunity to a disease and was spreading it to the majority black race as they were only carriers, this would scare the majority and cause fear, could be lots of things, we will probably never know

 

Clearly it is not always, as we have lots of black skinned humans.

 

yeah there doesn't appear to be simple answer but a combination of factors at work....sexual selection, if the owner of the desired trait is considered a hottie by the opposite sex they'll do well...

dietary, light skin is supposed to allow more vitamin D in northern latitudes, but Inuit don't have light skin like euros and do okay, sub-Saharan africans also suffer vitamin D deficiencies, people in northern latitudes tend to remain clothed so how are they getting required sunlight?...If light skin is an essential requirement for survival why is the adaptation to light skin relatively recent? and how did our ancestors survive for 40K years in the north without making the change????

cancer prevention dark skin vs light, unlikely, our ancestors would've died of melanoma after they'd reached adulthood and reproduced...something else would've killed them first...

lot's of contradictions...it's still a puzzle and no simple definitive answer

 

African Americans have white slave owner DNA from Europe, so it's not America that's making them lighter, but European ancestry.

 

Melting pots are multi racial multi ethnic communities and civilisations that breeds mutations and create new peoples.

 

yup, simple family resemblance the big melting pot.... a new ethnicity is being formed....

 

Recent finding you may find interesting.
http://www.sciencemag.org/news/2015/04/how-europeans-evolved-white-skin

 

DNA tests of prehistoric remains in England indicate they were dark skinned, so they were there before they became light...

a common misconception is that Africa is always hot but it can be quite cold in the dry regions...

 

Sickle cell isn't limited to the negro race.
Cornish people (Region of England) are said to have it.
But I think that's black people coming and staying in Britain in prehistoric times.
IDK.

 

hot is not the word I was looking for, much sun radiation that can cause skin damage, more so in paler colored skins when in the sun all day working

there also were probably black groups that moved out of Africa too, maybe they were lighter skin blacks, if the majority were dark dark black, this could be different enough to cause friction in those times - back then times were more tribal and less equal rights for all

just like what happened in Germany in modern times, there could of been groups that tried to get the majority race wanting to 'purify' their race, whites and lighter blacks were not 'pure' - this would definitely motivate the whites and lighter skin blacks to want to try and find a better life for their children

 

Not all DNA is active.

 

What does "have a lot of them" got to do with anything ??

You are inferring that having a lot of them suggests there is some kind of advantage.

Well we have a lot of homeless people. Do they have an advantage ??

Clearly not.

 

Dark skin is a disadvantage in intense sunlight.

This theory/hypothesis is upside down.

 

Mother Nature loves variety. That is why we have black skinned, and brown skinned, and white skinned, and caramel skinned, and freckled skinned peoples.

They are likely offshoots from each other.

The colors or lack thereof most likely developed later.

Most primates are white skinned under their fur.

So it is foolishness to ass-u-me that humans were any other color than white when they lost their fur as well.

 

Mutations can also be caused by cosmic rays and different chemicals in the environment. And these mutations would be added to the giant dice roll that is genetics.

 

I wouldn't really call it "White".

 

There may be mechanisms that turn genes...and therefore traits ...on and off. It could be that junk dna is not all junk. To say for sure you know why people are white or why people are black is arrogance. I select traits for breeding in my goats. It seems to work out well for body size and form but very haphazard for color. I put a white and brown nanny with an all brown billy and got a black and white offspring. But of course i wasn't breeding for color but body type and size.

 

South Park S08E07 The Goobacks...

Future people of the melting pot come back in time to take jobs from the present day locals.

They say we'd all be brown.

 

I used to breed guppies for color and body type when i was a kid. I liked the delta tail body type...with long flowing dorsal fin...and florescent purple color. I read book on breeding guppies and found the record keeping tedious. So one day i was watching PBS and they said Native Americans picked the largest seed to plant year after year and getting larger and larger seed as a result. So i applied this to breeding guppies. Choosing the traits i liked and picking better and better offspring to be bred together. It produced fine specimens with the traits i wanted. Genetics. ...after all....is chance. You up your chances by picking good traits to breed to begin with.