. The elements of experimental embryology. Embryology, Experimental; Embryology. organisers: inducers of differentiation SI formation of neural folds in these strange positions, with the result that two perfect heads and anterior trunk regions are formed. Further, it may be noted that it is impossible by the method of partially constricting gastrulae to obtain duplicitas posterior, or â '^T^<.. Fig- 75 Duplicitas cruciata, obtained by grafting together two gastrula-halves (see fig. 73); the heads and anterior regions of the trunk have a plane of symmetry which is at right angles to that of
. The elements of experimental embryology. Embryology, Experimental; Embryology. organisers: inducers of differentiation SI formation of neural folds in these strange positions, with the result that two perfect heads and anterior trunk regions are formed. Further, it may be noted that it is impossible by the method of partially constricting gastrulae to obtain duplicitas posterior, or â '^T^<.. Fig- 75 Duplicitas cruciata, obtained by grafting together two gastrula-halves (see fig. 73); the heads and anterior regions of the trunk have a plane of symmetry which is at right angles to that of the posterior regions of the trunk; the former are seen in ventral, the latter in side view. One of the heads has a cyclopia eye. (From Wessel, Arch. Entwmech. cvii, 1926.) doubling of the hind end. This is obviously because the constric- tion forces the anterior but not the posterior part of the primitive gut-roof to fork (fig. 169). On the other hand, both anterior and posterior doubling can be obtained by grafting together halves of gastrulae in such a way that their original planes of symmetry (and therefore, directions of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Huxley, Julian, 1887-1975; De Beer, Gavin, Sir, 1899-1972. New York [Hafner Pub. Co. ]
Size: 1644px × 1519px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectembryology
