My friend who has been growing for years says that the seeds will be all female if the plant turns hermie. he said that the reason they do this is because survival is the plants first and formost goal. Stress can kill a plant so the plant puts out all female seeds so that if somthing does happen after its life the seeds produce a plant that can go hermie if somthing stressful threatens the plants existant. its kinda of like an adaption. a male plant cant go hermie so producing a male plant in stressful conditions cant help the plant reproduce. I could be wrong but this is what my friend told me.