I remember talking with a woman who was very interested in Genetics, and she asked me what groups I would think would have genes worth studying. My answers were the usual ones:
- Iceland, where the people can be traced to a specific group of people
- The Amish, whose separation has led to them escaping certain diseases around them and having diseases no one has, and
- The Mormons, another small group with Polygamy included.
Turns out my thoughts were a bit limited. Now I'd include a few other groups:
- The Australian Aboriginies, as they've lived separated from the rest of humanity long enough to show up genetically
- The European Jewish populations, who like the Amish have been separated long enough to avoid the usual diseases and suffer from others.
- The Negev Bedouins (see link above), whose inbreeding is causing problems.