All opinion
Feminized seeds actually existing is what leads me to believe that sex is determined at pollination.
Think about it.
You have a female plant. That plant will not have a Y chromosome. A male set of chromosomes is XY, a female is XX.
You have a male plant so it has XY. To make a male there has to be both chromosomes and for a female you need only X chromosomes.
If sex were determined by environment, then every seed would have both an x and a Y. What happens to the Y chromosome when the resulting plant is female? In my opinion it was never there, exactly like when you produce a feminized seed.
IMO, the pollen either has two X chromosomes or an X and a Y.
It bothers me when people like subcool are so sure that they are right about environment and sex determination. They probably read the same article I did and thought that it sounded good. Everything I have learned about cannabis has for me pointed to the notion that sex is predetermined and there is nothing you can do about it.
I just went back and read the first part of Strawdog's article about sex and environment. It has so many holes in it and relies on such a small sample size, all while ignoring the possibility that his results were just coincidence and not reality. He starts off on this idea that feminized seeds can produce males (properly made feminized seeds can not produce males) and hermaphrodites (only dioecious hermaphrodites, which are not real hermaphrodites. Real hermaphrodites have both an X and a Y chromosome) and builds off of that faulty premise.
I think the guy who wrote the article about sex and environment had the misfortune to get a bunch of male seeds by coincidence. Then he got high and watched a nature documentary on crocodiles. Crocodile eggs are buried in a mound. On the side that gets more sun and heat, there will be more males. On the side that gets less sun and heat, there will be more females. I do not believe that is the case with cannabis seeds.
/sweet blog