Yes, every child had this DNA changed from his parent. Otherwise every human would look identical, and your wife would look like your mother.

Monsanto isn't doing voodoo, it's choosing to express genes that could happen naturally.

Also, a looot of plants in the nature have some sort of deterrent against thier predators, think nightshades, nettles, gimpie gimpies, pencil cactii, oleanders, daffodils, off the top of ny head.

And many others you regularily use have literal poisonous seeds to humans, like castor beans or peaches, plumps, cherries or nectarines.

You should read up before yelling "monsanto bad, gmo bad". Nature isn't perfect, it's random.