Can you name another genetic variation among humans that might be an adaptation to the environment? Why do you think it fits the category of adaptation?

dark skin color.

Explanation:

darker skin colors where more prominent in places closest to the equator.

In places such as russia, majority of people have lighter skin tones, showing that its an adaptation to the enviroment

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."