https://en.wikipedia.org/wiki/Ocular_albinism
be careful with the sensational pictures you can found in internet, this little girl is simply ill; that nothing to do with healthing blue eyes from Europeans.
Well, this example was used to show you that even black people can have blue eyes, which you didn't know.
Albinism is only a disease when effects skin, sometimes eyes, and exposes skin to UV radiation and cancer. People are pale and they can't tan.
Besides, personally I know 2 black people with blue eyes and they are completely healthy. They just have blue eye mutation. Mutation is a mutation, could be beneficial, and it could be disastrous, then we call it a disease. Sometimes it is confusing like a "sickle cell" mutation. It can protect you from malaria, but it also can give you a cycle cell anemia. This mutation is beneficial and a disease, good and bad, at the same time. Interestingly, this mutation is very common in Africa where malaria is. Talking about natural selection by environmental factors? Why Eskimos don't have this mutation popular?
Again we should be careful with this kind of sensational article; first that yet to find if their blond hairs is not a product of a form of albinism; by the way:
Yes, you can call it albinism of hair. But it is not a disease in this case. And listen to this:
But a new study fingers a random mutation instead
http://news.sciencemag.org/2012/05/origin-blond-afros-melanesia
I was right, saying that this is just a random and independent mutation.
Just keep in mind that these are just one gene mutations, unlike erupean skin.
The mutation, which has no obvious advantages, likely arose by chance in one individual and drifted to a high frequency in the Solomon Islands because the original population was small, says Jonathan Friedlaender, an anthropologist emeritus at Temple University in Philadelphia, Pennsylvania, who was not involved in the study. "This whole area seems to have been populated by very small groups of people making it across these stepping-stone islands, so you do have very dramatic effects in fluctuations of gene frequency."
If you read my post carefully you would notice that I'm in agreement with this.
What I'm arguing against is that as many as 5-10 European light skin mutations grew up to the scale of millions individuals just by a pure chance, and in the place that suits the white skin the most! Heck, we know that these mutations started in different original populations, through out whole Europe and West Asia. Now they are in one place. Do you know what is a the chance of it?!
If European developed black skin mutations spontaneously, or any Northern tribe of Syberia, you would have a point. But we know white skin is beneficial up north, it goes well with environment. Isn't it interesting, that it happens to be popular there?
That the opposite situation of WHG with blue eyes who have invaded mixed multiples times by brown peoples; again it was their isolation who have kept these blond afros.
How isolated where the Scandinavians in Europe? Farmers got there in Neolithic, Corded Ware in Bronze Age, then there were Samis/Finnish, and who knows who else. And yet, despite all of this mixing, they are overwhelmingly blond. Heck, they became more blond with time. They were less blond in Mesolithic. The recessive gene in action?
I'm not saying it isn't recessive, it is, but even a recessive gene can get "popular" if it is very beneficial. It gives survival advantage to the host and host's kids, therefore is propagated through the population. It is simple like this, and explains why recessive genes are persisting in spite of being recessive. It is simple and beautiful explanation.
Well first the theory of WHG peoples with blue eyes is the opposite of your example, because peoples who defend say they are the ones sources of blue eyes, they don't say Europeans have multiples genes for blue eyes from multiples peoples...
The white skin and blue eyes science is still young. We don't know all the details.
.it's the problem of your example of the natural selection because blue eyes were supposed among a tiny group and is extremely recessive
The same way the blond hair in Papua had spread over entire population.
Again, you concentrated on one gene mutation. White European skin is a product of many mutations, which "surprisingly" and conveniently like the North Europe the most.
Your theory have yet to be proven, so I don't know how you can say that the true, you have no idea what they have caused blue eyes, blond hairs etc...
Right, so lets talk about white skin, which is roughly figured out.