[Jedi Master Pikachu]

"Getting fat will not create nor destroy your genes."

It might change whether or not those genes are expressed, though.

[muawiyah]

Well, it might and it might not. SOmetime before birth half your genes get shut down anyway ~ randomly ~ one strand here, the other strand there, etc.

Throughout your life you will lose cells of one or both varieties at different rates. Stuff can show up later on that was insignificant in your early years. Important stuff can disappear over the years.

Getting fat is symptomatic, not a cause, of diabetes Type II. Frequently folks gain a lot of weight long before they notice any other problem.