Twin Seedlings
From a second cannabis website:
We’ve been having trouble getting a consensus on the matter of polyembryony in cannabis. There is research in other plants such as oranges and mangos which show that a pair of twin, or polyembryonic seedlings from a single seed will prove to be 2 completely differing cultivars; one being of heterozygous lineage of the two parent plants and the other seedling will be a direct “clone” match of the mother plant. From my reading, I have found that It is used often for mango, citrus and other cultivars to get true to type fruits and plants, and I have also read online that this is true for cannabis.
I carefully separated the two seedlings into their own pots, labeled them and vegged them out, took clones, and put them into flower. The entire time they grew similarly, but had completely different stem rub smells; one was more basic cannabis vegetation with a light orange hint to it and the second is more of an intense burnt rubber and orange peels kind of smell. Once put into flower I quickly realized, not only were they starting to completely deviate in structure, but I had one male plant and one female plant. Remember, these both came from a single seed.
From a third cannabis website:
Some cannabis seeds can germinate two plants. Technically, this is a phenomenon known as polyembryony. This happens just as in the human species. In this case, however, one plant will be normal and one will be a clone of the mother. Like with human conjoined twins, you cannot separate these plants too early. They can be separated when they reach between 20-25cm in height. This phenomenon should not be confused with real “Siamese Twin” marijuana, which is a mutation in which two plants share the same root.
Disclaimer: I have no idea if any of this is true. I do not know where these people are getting their information. I have never seen a 'twin seedling' though I suppose it is only a matter of time before I do. For entertainment purposes only. Like stringbeanonna mellow said, I have not been able to find any scientific research on this.
Longball