Can't tell with the rapid rooter how many tap roots there are, if I had to guess I would wager 2. I suppose if they both live and grow identical they would be "siamese twins", if they are each genetically different then they aren't. Not very scientific though. I am interested to see how it turns out, hopefully they both live as they are both feeding on the reserves stored in the seed. I have heard of times where one is male and the other female.