Always keep your seeds if you find them and label them and if stored properly can be used when needed. I have 20 plus year old strains here and still viable. A very few. BAg seed. Mostly cross bred genetics by other growers handed down to me as I passed by their gardens..
Lotta people dont know when you find a seed in your bag its usually because the grower did somthing causing it so the seed is naturally feminized and will almost always be a female seed as long as you dont have a genetic hermie pollinating your girls it should always be a female seed