It's a fact of science, not an opinion. Here was the interview of professor Palotie, but in is Finnish because it was in Finnish newspaper.
Aamulehti Sunnuntai | Pääjutut
But this large genetic research has also been in Nature and other science magazines.
It's 18 $ for that Nature article, here is the Google information:
Identification of a variant associated with adult-type ... -
Lactase non-persistence limits the use of fresh milk among adults. .... from less than 5% in northern Europe to almost 100% in southeast Asia7. .... H. & Ruth, M. Phylogenetic analysis of the evolution of lactose digestion in adults. ... PubMed |; Ihalainen, J., Siitari, H., Laine, S., Syvanen, A.-C. & Palotie, ...
www.nature.com/ng/journal/v30/n2/full/ng826.html -
As I said the mutation got common were it gave advantage for surviving, not elsewhere: among the people after ice age going to North were there was not always enough food. Some of them had cows (not before it), to help them survive in those circumstances. And cow has been here very common in last few thousend of years, and just because of milk helping surviving. So late as 1880's tens of percent of people died here in a few years because of bad wheather and therefore not enough food.
And just to remember: almost all genetic mutations are harmful or "neutral", just very few mutations give any advantages. I have read that everybody have about 20 mutations or "mistakes" in genes, but you don't notice them, cause their have not so much effect. There are, as you know, genetic deceases and fatal mutations, too. Prof. Palotie has researched those very much. Because one of my sons has an extremly rare genetic (new) mutation - there are just about 3 "cases" in the whole country - with heavy disadvantages, I'm litterally familiar with this issue. There has not been just a doctor or a professor researching and helping our "case", there have been tens of them from Europe and US. And thanks for their high knowledge and care our "case survived" (if borned just 20 years earlier he wouldn't, with scientific knowledge of that time), and tries now to go to study in to an University.
But as said, not a good idea to go off topic and discuss here in DB about evolution....so better go back to proteins.
Aamulehti Sunnuntai | Pääjutut
But this large genetic research has also been in Nature and other science magazines.
It's 18 $ for that Nature article, here is the Google information:
Identification of a variant associated with adult-type ... -
Lactase non-persistence limits the use of fresh milk among adults. .... from less than 5% in northern Europe to almost 100% in southeast Asia7. .... H. & Ruth, M. Phylogenetic analysis of the evolution of lactose digestion in adults. ... PubMed |; Ihalainen, J., Siitari, H., Laine, S., Syvanen, A.-C. & Palotie, ...
www.nature.com/ng/journal/v30/n2/full/ng826.html -
As I said the mutation got common were it gave advantage for surviving, not elsewhere: among the people after ice age going to North were there was not always enough food. Some of them had cows (not before it), to help them survive in those circumstances. And cow has been here very common in last few thousend of years, and just because of milk helping surviving. So late as 1880's tens of percent of people died here in a few years because of bad wheather and therefore not enough food.
And just to remember: almost all genetic mutations are harmful or "neutral", just very few mutations give any advantages. I have read that everybody have about 20 mutations or "mistakes" in genes, but you don't notice them, cause their have not so much effect. There are, as you know, genetic deceases and fatal mutations, too. Prof. Palotie has researched those very much. Because one of my sons has an extremly rare genetic (new) mutation - there are just about 3 "cases" in the whole country - with heavy disadvantages, I'm litterally familiar with this issue. There has not been just a doctor or a professor researching and helping our "case", there have been tens of them from Europe and US. And thanks for their high knowledge and care our "case survived" (if borned just 20 years earlier he wouldn't, with scientific knowledge of that time), and tries now to go to study in to an University.
But as said, not a good idea to go off topic and discuss here in DB about evolution....so better go back to proteins.
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