测试两栖动物肢体再生的钟面模型。

Experientia. 1978 Oct 15;34(10):1360-1. doi: 10.1007/BF01981472.

Contrary to the predictions of the clockface model, rotating a regenerate by 90 degrees produces duplications identical to those resulting from 180 degrees axial reversals. Exchanging regenerates between arms indicates the presence of 2 determined transverse axes.

与钟面模型的预测相反，将再生体旋转90度会产生与180度轴向反转所产生的重复相同的重复。在臂之间交换再生体表明存在2个确定的横向轴。