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| Description: All vertebrates go through a stage in which they have four limb buds, a tail, and a series of somites – divisions of the body that give rise to a backbone. The embryos of many vertebrate species develop in similar ways – directed by the very same genes. Differences are brought about by variations in expression patterns of master genes that govern development. Picture Stats: Views: 67 Filesize: 70.25kB Height: 1173 Width: 265 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=48468 |