system
Given the following post, respond as if you're commenting on Reddit:
human
What genetic diseases/syndromes are more prevelant in Europeans than other ethnic groups?

For example, it is often stated that sickle cell anaemia and diabetes affect people of Afro Carribean descent more, as lactose intolerance is also more prevelant in south eastern Asians. What intolerances/genetic diseases are found more in white Europeans?
gpt
Lactose intolerance is not a genetic disorder.  It's the standard.  Lactose tolerance, which is prevalent in europeans, is the more recent genetic adaptation.  It's actually one of the clearest examples of recent natural selection in human populations.  Lactase persistence clearly conferred a selective advantage in the european population where it arose, and has expanded greatly in the not-too-distant past.