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Figure 1


Fig. 1. CheWnt3 RNA is localised to the animal/oral pole of eggs and embryos. (A) The relationship between egg animal-vegetal polarity, gastrulation and embryo oral-aboral polarity in Clytia. The animal pole of the egg marks the site of cell ingression at gastrulation and the future oral pole of the embryo and planula larva. (B) In situ hybridisation analysis of Wnt3 expression in embryos from unfertilised eggs to mid-blastula stage (top row) and from early gastrula to 1-day-old planula (bottom row). Embryos are oriented with the animal/oral pole up. Scale bar: 40 µm.





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