Looks like it’s a bit early to tell. Get pictures at the point where a branch meets the trunk. That’s where it shows up. If you have a cluster of bananas it’s a boy if you have white hairs it’s a female. Welcome to the community!
It’s a bit early to tell wait another couple of weeks and it should be showing. You look at the node, where the branches meet the stem, for white hairs or almost banana bunches. I’m basically reiterating what BluntForceTrauma420 said. If you are going to ask again in a week or so take close up pictures of the nodes to make it easier to identify.
What those guys said.
Welcome to the community!
Welcome, and if you want to know quickly, just take ready-to-use bloom fertilizer and spray the leaves. 2 days later you’ll know: if they continue to grow without switching to bloom, then they are photoperiodic.
Happy Growin 
Can you explain that in more detail for me?
If you give them flowering boosters, they will show their sex shortly afterwards. This does not change their normal growth behavior. These are actually just the early signs appearing, and the rest will follow with the correct lighting duration.
I’ve heard this before, I did it on 3 separate occasions at 3-4 weeks of veg. It never worked unfortunately. I find flipping to 12/12 for 2-3 days and then flipping back to 18/6 works without issue ime.
Cool 
quite good if you grow regular ladies, I think 
I still have a mixed bag with seeds from my best friend from Hamburg. It could be anything. Collected from the caravan site at the punks’ place 
Thank you 
Exactly as @herr_gruen said, you can also give bloom fertilizer 1-2 times when watering, but then it takes a bit longer for a reaction. I had sprayed a regular lady instead of watering during its growing, and already one day later the hairs appeared.