You can make a female into a male, and thus ensure you are getting all female seeds. Using a male plant to polinate a female will get you roughly 50/50 male/female seeds and IMO, seeds like this are a waste to plant, especially for autoflowers and waste all the time till they flower just to find 50% are males. You're better off looking how to force a female to become male. This will get you pollen with only female genetics. This is how they make female only seeds.