It's one missing tooth, not the end of the world. And yes, you can get missing from parents who are full and you can get full from parents who have more than one missing.

There are many more things much worse then 1 missing tooth. There are many Champions with more than 1 missing.

Don't worry, it's small change and yes I have a girl with 1 missing tooth. Both parents had full dentature and so do her 2 daughters.