Unless the spindle is specifically rotated during prometaphase, normal centrosomal behavior dictates that the cleavage orientation of a given blastomere division will be parallel to the cleavage orientation of its parent cell in the preceding division. Name two properties of each cell type that distinguish one from the other. The gut is formed during the process of gastrulation. The amnion begins to form before gastrulation. The yolk sac membrane functions to provide nutrients to the developing embryo.
Embryonic endoderm is formed by the process of gastrulation.
Gastrulation involves an epithelial to mesenchymal transformation. The blastocoele becomes the embryonic coelom. Name a derivative of the pharynx found in amphibia but not in birds or mammals. Longer questions 12. When transition zones between the neural plate and the epidermis are cultured, they form neural folds.