Heirloom vs regular seeds?

[ChanellG]

That's not absolutely the case, especially with heirloom tomatoes and potatoes.
It just tends to be the case that they were bred for purpose a long time ago.

Well, everything has to come from somewhere. However, corn is no longer corn, etc. Whatever was indigenously growing in a landscape would have cross pollinated naturally over time even without human interference. We could probably say that nothing is truly an heirloom and that somewhere in history all plants could be related just like humans.