Good question and if you want to grow autos making seeds could save you a lot of $. Honestly it confuses me on how to guarantee auto seeds but I have to think that using CS to make pollen from an auto on an auto will give you auto seeds. 

As for cross breeding, there are mixed answers on here as to does fermionized pollen make a true cross or not. My opinion is the genetics game in nature is a crap shoot so chances are it could make a different plant but either way the dominant genes are coming from the mother.  From what I have read when you cross breed its 75% from the mother 25% from the father but I think there is an infinite # of variables in that .

Be advised though there is some scientific fact to prove Auto's trying to cross breed themselves are the reason for what happened at Chernobyl and the real reason for the explosion's on Hiroshima & Nagasaki.