File:Hilfer1990 Fig13.jpg: Difference between revisions
mNo edit summary |
mNo edit summary |
||
Line 1: | Line 1: | ||
==Figure 13. Spemann and H. Mangold (1924) induction in amphibian embryos== | ==Figure 13. Spemann and H. Mangold (1924) induction in amphibian embryos== | ||
The classical experiments of Spemann and H. Mangold (1924) demonstrated induction in amphibian embryos. | |||
A graft of the dorsal lip of the blastopore was made from an unpigmented species to a pigmented species. The graft was placed in the future ventral region of the body. | |||
At the neurula stage, the normal neural plate is found on the dorsal surface (left) and a second neural plate, containing the graft on the ventral surface (center). | |||
The result was the formation of a secondary embryonic axis which produced Siamese twinning (right). | |||
Line 8: | Line 13: | ||
{{Hilfer1990figures}} | {{Hilfer1990figures}} | ||
[[Category: | [[Category:Hans Spemann]] |
Latest revision as of 16:31, 22 October 2014
Figure 13. Spemann and H. Mangold (1924) induction in amphibian embryos
The classical experiments of Spemann and H. Mangold (1924) demonstrated induction in amphibian embryos.
A graft of the dorsal lip of the blastopore was made from an unpigmented species to a pigmented species. The graft was placed in the future ventral region of the body.
At the neurula stage, the normal neural plate is found on the dorsal surface (left) and a second neural plate, containing the graft on the ventral surface (center).
The result was the formation of a secondary embryonic axis which produced Siamese twinning (right).
- Figures: Fig 1. by N. Hartsoeker 1694 | Fig 2. by M. Malpighi 1673 | Fig 3. by C.E. von Baer 1827 | Fig 4. by W. Roux 1888 | Fig 5. by H. Driesch 1892 | Fig 6. Louis Agassiz | Fig 7. Leonard W. Williams c1900 | Fig 8. by Conklin 1905 | Fig 9. by Wilson 1892 | Fig 10. by Loeb 1893 | Fig 11. by E. B. Wilson 1904 | Fig 12. by O.E. Schotte | Fig 13. by Spemann and H. Mangold 1924 | Fig 14. by S. Horstadius 1928 | Fig 15. by R. G. Harrison 1921 | Fig 16. by Townes and Holtfreter 1955
Cite this page: Hill, M.A. (2024, May 28) Embryology Hilfer1990 Fig13.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hilfer1990_Fig13.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 10:24, 28 August 2014 | 1,200 × 680 (157 KB) | Z8600021 (talk | contribs) | {{Hilfer1990figures}} |
You cannot overwrite this file.
File usage
The following page uses this file: