hi, for sure you should watch her what she does the coming days. If she shows more bananas, take them away. with good luck they are sterile:And the causing of buliding banasnas is different, most time its stress, but as you mentioned it can be genetics too ( its a bagseed isnt it,,, ... so i think her " mother built some sacks or bananas too..... and pollinated herself. But dont worry, even if shes pollinated, the weed will be smokeable. Its no big issue ( in my opinion) its a female plant at all. So watch er and take away the male stuff