feminised seeds

Is it true that a female plant can make feminised seeds even without a male present?

whats the secret?

Also

Cutting the sunleaves off is a debatable technique, is this a good or bad technique?

do u mean fan leaves if so leave them on

yes

that definitely must be the golden secret, how to make feminised seeds, like i know u can pick them when u use a male female for pollenation, but how do they know its a female seed?