Chondrocytes are the cells that make up cartilage. As I understand it, the best growth factor that signals replication of chondrocytes is Bone morphogenetic protein 7.
If supplied with a sufficient source of nutrients and a growth factor, would those chondrocytes begin to replicate?
If you prepare a Petri dish full of blood and cartilage and add BMP7, would the cartilage start to grow? Are those two questions the same?