The larger ones are males, the smaller ones females. They will wander around, and reproduce if a male touches a female. They tend to die out rather quickly... I added growth, and they can still make up to six clones, but only six, at once. They now also produce a combination of male and female, increasing the chance of reproduction. They can only reproduce when near-fully grown, and only once. Unfortunately, all of this only works when the interaction is with the original mother or father. Clones cannot interact with each other...
Remixed off of zozzie2's remix of my project inspired by her project. Try a rutabaga, they're good for you.