| 11. | Once this process is completed, gastrulation starts.
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| 12. | Inactivation occurs in the epiblast during gastrulation, which gives rise to the embryo.
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| 13. | Gsc is found in high concentrations in the dorsal mesoderm and endoderm during gastrulation.
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| 14. | Germ-band extension begins shortly after gastrulation and is divided into two phases.
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| 15. | At this point gastrulation is complete, and the gastrula has a functional digestive tube.
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| 16. | Chordin is also involved in avian gastrulation.
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| 17. | STAT3-deficient mouse embryos cannot develop beyond embryonic day 7, when gastrulation begins.
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| 18. | This perspective can shed new light on phenomena as diverse as gastrulation and germ line sequestration.
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| 19. | It is important to note that mice in which BMP4 was inactivated usually died during gastrulation.
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| 20. | Hensen's node is the site where gastrulation begins and it becomes the dorsal mesoderm.
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