This is a banana right?

Yes all cannabis is hermaphrodite. But this is nothing more than a single male flower at the late flowering cycle . It's also a natural way of making feminized seed. Will your crop be destroyed by every flower being pollinated ? Absolutely not !

Yes it is. You caught it very early. You can remove nanners as they appear if you're diligent enough.

i cant see it clearly if its solid and shaped like banana --- yes, just remove the part and go on with the grow

Looks like it , but not that clear picture