XB-IMG-159338
Xenbase Image ID: 159338
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Figure 1.
D'Arcy Thompson's 1917 illustration of his theory of coordinate transformations during evolution of related animals. In his view, morphological change occurs through transformations of the animal body plan within the constraints of a set of Cartesian coordinates. This is shown here for two closely related fish species, the porcupine fish Diodon (left) and the sunfish Orthagoricus (right, also known as Mola mola). We propose that modification of the Chordin/Tolloid/BMP morphogen gradient could have mediated such evolutionary changes in body forms. Image published in: De Robertis EM et al. (2017) Copyright © 2017. Image reproduced with permission of the Publisher, John Wiley & Sons. Larger Image Printer Friendly View |