Really important science question !!!!!?

I do not know if this will help but with respect to Cell transport across membranes i can think of two examples. In human beings there are people who are prone to develop type 2 diabetes and those who are resistant. Originally all humans were the first type but due to development of Agriculture a mutation was selected for due to an abundance that brought on diabetes. the second is in respect to the virus that causes AIDS, HIV. There exists a population mostly Caucasian (in the Grease Islands and parts of the Balk-lands) 30% of those who are all but imune to the virus since the mutaion is a proteein on the cell membrane that prohibits entry for the virus.