Monique
Staff Emeritus
Science Advisor
Gold Member
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Aint it interesting how human skin color has evolved? I think it is amazing how graded it is and that it is still preserved today. The very dark African skin tones, the middle Meditteranian one and the very fair scandinavians. Skandinavians actually lost the active gene that causes dark pigmentation, and they are at great risk for developing skin cancers when they move to regions close to the equator.
This could be an example how a niche is created, where very fair people get geographically isolated (although with all the SPF creams we have today, they could protect themselves artificially).
Genetic researchers in these days are very interested in isolated populations, I recently attended a conference on it in Italy. The genomes of these populations have special features that allow us to locate disease genes. In Finland alone there is a collection of 30 genetic disorders that has a high frequency in Finland, but which are almost non existent in the rest of the world (all the genes have been located because of the Finnish subisolates). Thus a very clear enrichement of certain rare alleles.
I wouldn't define this as evolution though, but it definitely is a mechanism of evolution.
This could be an example how a niche is created, where very fair people get geographically isolated (although with all the SPF creams we have today, they could protect themselves artificially).
Genetic researchers in these days are very interested in isolated populations, I recently attended a conference on it in Italy. The genomes of these populations have special features that allow us to locate disease genes. In Finland alone there is a collection of 30 genetic disorders that has a high frequency in Finland, but which are almost non existent in the rest of the world (all the genes have been located because of the Finnish subisolates). Thus a very clear enrichement of certain rare alleles.
I wouldn't define this as evolution though, but it definitely is a mechanism of evolution.