If you look closer to the new pic you will see a ball forming on the first node.That newest pic could be a female, so don't chop it yet. I see a tiny preflower started, and it looks like it could be female, with their sorta pointy preflowers. Is there any way you could get a really close up pic of the upper internodes? It would have to be a really good pic to know for sure, so you might have to wait 1-2 days, then post new pics. We'll see.
If you look closer to the new pic you will see a ball forming on the first node.