I have some breeding experience, and no seeds from feminised seed will not be feminized, its a process you bring onto the plant while in grow phase, where you add silver moliculed water, that surpress a gas which is needed to become a male, and they all become female.
so what you have is self pollinated seed… and will most likely have 75% of being the same as the mother.. it can be a fully funktional seed.. or turn out to be a hermie, just grow it as usually and if it shows signs of being a hermie toss it :)