Will natural blondes and redheads no longer exist in 200 years?

I have heard this rumor about a lot of countries, including mine (Germany, central Europe). Suffice it to say that nobody so far has found out how exactly the color of the eyes and hair is inherited in humans (although there seems to be a dark dominance), blondes probably will keep on existing. Living in central Europe during these interesting times now, there will probably an infusion of blondes from the Slavic countries, while the Swedish, in the ,long run, might be mixed with typically dark-eyed Syrians.

I won't live to see the result, it will show in two generations, when I'm long dead and gone. For the time being, I'd like to have an App for my phone that tells me from a distancce whether a woman is genuine blonde or peroxidised. Should be possible, ain't it?

No, in the USA according to the recent 2010 census ,white Americans are an estimate 63.% ( I think estimate 200 million), of USA populace , at least half or so of this group/s are decendants of the indigenous peoples of what is now Northern Europe ( Ireland 10.% ,English 10.%, Germanic 15.% or so, ) and these groups are found to have the highest or some of the highest proportion of their population with natural blonde or red hair or the genes for it, and so in the USA they will still be alright and I've met many families with four to five children with the aforementioned phenotypes so there is a future for them,as for other countries I don't know ,

No offense

Of course they will survive. How do you think blond and red hair managed to survive and spread to begin with? All Europeans were dark haired and dark eyed when they first reached Europe; then a blue eyed mutation happened in one person only 10,000 years ago.Lighter hair appeared around the same time. Even today most Europeans are not blond or blue eyed.

Even if everyone was 'mixed' what you propose wouldn't happen as the genes for that colouring would be in both parents and would on occasion be expressed.. You'd then get light haired people marrying other light people and producing still more.

Northern tribes? I've not seen any around here for a long time, unless you are referring to Newcastle United FC Fans. Using the term "mongrel" to describe humans is a bit harsh, and to be honest, from a biological point of view, illogical.

Genes have always moved around, free of any human categorisations such as "race". I'm pretty sure that the genes that promote low levels of melanin, blonde hair, and red hair, will be with us for a very long time yet.

All humans are "mongrels". The notion of "pure race" is absurd. Regional differences in appearance are superficial and of fairly recent origin. We all share the same African ancestry. Your question indicates deep ignorance. Redheadedness is a gene mutation that occurs in virtually all groups worldwide. It is present in Asian as well as African groups. Blondeness is a recessive gene so it may be less common in populations over time due to fewer blondes mating with blondes, but as a recessive gene it can "hide" in the genome and pop up eventually in any population. Blondes have never been all that common, but there is no genetic reason why they would dissappear completely.

The amount of immigrants in areas of natural blonds and redheads is very small. Their gene pool would be too small to affect the population.

Why worry about that? You won't be around at that time, having been gone for at least 120 years or more.

You want an endangered sub species act like they have for amur leopard, Indian Lions and various Tiger sub species.

There is no logical evidence for such an assumption

1000 years is more like it.