Dorsal Specification in the Fertilized Frog Egg
Eggs of most animals have asymmetric distributions of molecules and organelles which are used to specify developmental pathways in the embryo. These asymmetries are enhanced and new ones are created by cytoplasmic movements after fertilization. Development in frogs illustrates these points.
KeywordsLithium Progesterone Manes Colchicine Cytochalasin
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