Final answer:
In the chick embryo, left-right asymmetry is generated through a process involving multiple genes. One significant experiment showed that dorsal cells are responsible for forming the notochord and defining the axis. Mutations in genes involved in axis formation can disrupt symmetry and organism development.
Step-by-step explanation:
The establishment of left-right asymmetry in the chick embryo is a complex process involving multiple genes. One of the most significant experiments in this field involved the transplantation of dorsal cells from one embryo into the belly region of another. This experiment revealed that the dorsal cells were genetically programmed to form the notochord and define the axis. Researchers have since identified many genes responsible for axis formation, and mutations in these genes can lead to the loss of symmetry required for organism development.