Key example here: there's a variant of a gene called MAO-A, and if you have that variant, you are far more likely to commit antisocial violence if, and only if, you were abused as a child.
Un ejemplo clave aquí: hay una variante de gen llamado MAO-A y si uno tiene esa variante, tiene mucha mayor probabilidad de cometer violencia antisocial solo, si uno ha sufrido abusados en la niñez.