Yes, you can develop herms from all of the things you mentioned.

Are the blobs on a stalk? =male
Are they snug in the node, with a pair of tiny hairs? =female

Herms, oh my. Such is the risk you run playing with so-called 'feminized' beans.
stinkyattic Reviewed by stinkyattic on . Stupid Question Time OK here it is people - just something, that was buggin me.. I have 6 feminized plants growing right now - see other threads for details.. Is it possible to develop hermie's due to stress, heat damage, too much heat ?? I know what males look like, its just that i've just noticed tiny little "blobs?" at each internodal growth from about 4th onwards - i'd show but my camera has no macro. Certainly doesn't look like male growth to me. Mmm just not sure. I know, probably a dumb question, I'll Rating: 5