Quote Originally Posted by CanGroIt
Is it possible that you might have flipped to 12/12 too soon that it caused the plant to stress so much it turned?
Highly unlikely. The plant will just keep growing till it's mature enough to start flowering. Best to leave 'em in the veg cycle till they're mature enough to switch to flowering. (already showing pre-flowers) But I've never had a plant stress enough to throw nanners because of flipping too early. Sucked-up and scraggly-looking, but no hermies.

A more likely scenario is:
A light leak. No light at all during the 12 hour dark period.
Inconsistent light schedule.
Temperature fluctuation.
Inadequate air exchange.
Bagseed genetics. (a crappy genetic past)

Pollen can stick around and adversely affect your crops on down the line. (it kills your yield when making seeds)

If you purchased your seeds retail, it is likely that this is the result of something you've done. You need to identify the cause of the stress, or you'll keep getting the same results.
If the genetics are solid, and if you had some experience...I'd recommend you re-veg her. But you need to know how to prevent hermaphrodites before you try and work with 'em.

Trash-n-learn. (trash the hermie, and use it as a learning experience) Try and wipe-down any surface that the pollen might have stuck to with a damp rag. (water kills pollen)

Likely a good idea to read the grow logs and basic growing forums till your eyes bleed, and to learn the parts of your plants. Mistaking the pollen for THC is a rookie mistake. <doh> THC is manufactured/contained in the globular head of the trichome.