Yes, but it is better to create them yourself as it is cheaper and you’ll know more about the genetics.
You can apply the same techniques as with feminized seeds.
As with regular seeds you get both male and female plants, this is perfect for creating your own strain.
It is not advised as more attention is required and the male and female plants need to be separated.
Both, with regular seed you have a 50/50 chance to get a male or female plant.