Question

During gastrulation blastomeres move from the surface to their destination in the embryo. These movements are called

• A. Migratory movements
• B. Formative movements
• C. Morphogenetic movements
• D. All the above

Answer 1

Answer: (D)

All the above

Morphogenetic movements are caused by large-scale and dynamic movement of embryonic cells. It rearranges the distribution of embryonic cells, thereby allowing the interaction between germ layers that previously existed separately. It occurs during gastrulation. During gastrulation, there occurs cell migration of extensive highly organised epithelial and mesenchymal cells. Formative movements occur in the formation of the dorsolateral grooves on the archenteron or the gut cavity, during gastrulation. So all kinds of movements occur during gastrulation. So the correct answer is D.