If the trait that dictates whether an individual cannabis specimin is a photperiod or an 'autoflower' is monogenic and you have one parent that is true-breeding for the photosensitive trait and one parent with the 'auto-flowering' trait, and the 'auto-flowering' trait (presuming it even is it's own individual trait) is truely a recessive trait (the commonly held belief), then it is not possible to have autoflowering specimens in the F1 generation. Therefore, I conclude that the 'auto-flowering' trait is either NOT monogenic or (insert makeshift hypothesis I wrote in earlier post, too lazy to write it all).... Or you guys just don't have specimens that are actually true-breeding for the photosensitive trait, which I doubt because I trust you breeders can accurately identify recessive and dominant traits in your gene stock (no sarcasm intended/ to be taken literally).
But who knows, I'm just some guy who is high as fk and trying to weigh-in on matters that are better left to the real breeders.
However, if the hypothesis I put down in this thread turns out to be true, don't forget that Farmacy found it out and would appreciate you giving me a job at a advanced grow facility, lol... Seriously.