Tiny flowering! What's the deal?

Hello, TV land,

I started 4 plants, and they have been growing pretty good, but they are only about 6" tall or so, and I'm quite certain that they are starting to show sex. My questions are;
1- is it possible to show sex during vegetative phase?
2- if they are already flowering, do I just have some kind of bonzai MJ plants? What gives?

Also, I know that this is a male, which is a drag, but at least one is a female, so I'm calling it a "W."

they should not be showing sex in veg are u sure u are using a 18 hour lighting schedule. and if one is a male should get rid of it unless ur seeding

Even if he was using 12 hour light schedule that thing shouldn't be showing sex this early from seed UNLESS you have a mutated autoflower.