But it is likely that people who are predisposed to gain weight and become diabetic are also the people who use artificial sweeteners instead of sugar.
A study of 4-year-olds at a ballet class couldn't assess rhythm effectively because some had already taken classes before or dance at home creating predisposed knowledge.
There are also plenty of other unidentified genes on the X chromosome, so individuals with Turner syndrome are predisposed to cardiovascular defects like preductal coarctation of the aorta and bicuspid aortic valve.
And there...it has also been shown that those same microbes might be missing from babies who are born by C-section or who are predisposed to heavy loads of antibiotics in early life.