This person has little understanding of evolution or genetics. Seems a strange article to post here. To be positive the reason the lactase persistence allele h

This person has little understanding of evolution or genetics. Seems a strange article to post here. To be positive the reason the lactase persistence allele has become very frequent in Northern Europe was not due to a population bottle neck, but due to the small selective effect of being able to extract more nutrition from milk than those without it. The people with the gene had more children (on average) that survived to adulthood and so over a couple of thousand years the allele came to become very frequent in some populations. This is evolution in action.