A little clarification on "feminized" seeds. In the simplest terms, these are made by treating a genetically female plant with colloidal silver (though I'm told that there are other chemicals that are sometimes used as well). This causes the female plant to produce morphologically male flowers. These flowers produce pollen like any male plant, but because the plant is genetically female, so is the pollen. That pollen can be used to pollinate a genetically female plant, producing *almost* all female seeds.
Cannabis is a really amazing plant!
But, like all of nature, it's imperfect, so there are sometimes a small percentage of male seeds in the mix.
At the nursery, we guarantee it'll be less than 1%, but breeders tell us it's more like less than 0.1% or 1-in-1000 feminized seeds will be male.
So, if you're growing from feminized seeds, be aware that you still have to look for males! See the images in the OP to help you if you're new to this.