Hey Badger
I’m guessing those plants showing “photo period” light triggers were more than likely the result of human error…stray “photo” seed somehow getting into the mix…
That said, I remember my genetics way back when in University and the topic of “Trisomy X”
…a rare condition in which a female human carries 3 as opposed to 2 chromosomes. Those chromosomes carry the permutations and combinations of genes that affect physical outcome…
That said, either way, Autos do come from a recognized and defined homozygous recessive combination…
Cheers
Here’s a little blurb I found to help explain…