The fact that feminized seeds exist suggests to me that sex is predetermined and that environment has nothing to do with it.
I am a smart ass, but not that smart ass.
Do you have something that shows that sex is not predetermined in cannabis seeds? I have been unable to find anything that backs that up. Common sense leads me to believe that cannabis seeds already have the sex determined.
So you do not understand biology on a high school level?
I would bet the farm that sex in cannabis is determined in the seed and not by the environment.
This is based on my personal experience producing seeds and the fact that
I can not find any evidence which backs up environmental factors determining sex in cannabis.
Let me explain this to you, if you are willing to open your ears for a second...
Sex, or gender, for almost every existent eukaryote (multi-cellular organism), is determined through a process called meiosis. I'm not going to patronize you by explaining what meiosis is, if you aren't aware you can look it up, but I have a feeling you are very well aware of the process.
The question then becomes what determines gender, and when it is determined. In homosapiens, for example, an XY sex-determination system plays out, where specific sex chromosomes (XX) and (XY) have been isolated during meiosis, and shown at certain combinations to produce certain results. This type of sex-determination can also be found in a few species of plants, Ginkgo being a well known one.
Another type of sex-determination system is called "Temperature-dependent sex-determinaion". It has been well documented in numerous reptile species, and is currently being studied for hundreds of dioecious flowers.
For most dioecious plants, including cannabis, the type of sex-determination system the plant uses is largely unknown. Our knowledge regarding its function is increasing day by day.
Hopefully you will take a minute to look up exactly how gender is determined throughout the animal world, it is remarkably fascinating. I hope one day as a species we will better understand sex-determination in the plant world, because it is simply unsolved at this point in time.