While playing on her swing set, 10-year-old Yasmin falls and breaks her right leg. Art the emergency room, the physician tells Yasmin’s parents that the proximal end of the tibia, where the epiphysis meets the diaphysis, is fractured. The fracture is properly set and eventually heals. During a routine physical when she is 18, Yasmin learns that her right leg is 2 cm shorter than her left, probably because of her accident. What might account for this difference?