How is it possible for us to have a genetic disease that your grandparents had/have but our parents never had it

When france sneezes, europe catches cold.what did prince metternich mean by this statement? people in france are more likely to get sick than people elsewhere. europeans elsewhere are often inspired by events in france. happenings in france rarely spread across borders. all damaging incidents in europe start in france.

Can someone me answer all the questions?

"six months ago, several of molly's friends joined the trimtime fitness center. each of them participated in trimtime's weight-reduction and fitness regimen. all reported substantial weight reduction, and all are visibly slimmer. molly is convinced. she joins trimtime and enrolls in the program, hoping and expecting to see the same results. she is especially delighted to learn that trimtime had adjusted its program to make it even more effective in a shorter period of time." what is the feature in question/attribute of interest in this argument?