Question

Cell migration occurs extensively during ______. A. organogenesis, but not during gastrulation or cleavage B. cleavage, but not during gastrulation or organogenesis C. gastrulation and cleavage D. both gastrulation and organogenesis

Answer 1

Cell migration occurs extensively during both gastrulation and organogenesis.

Cell migration occurs extensively during gastrulation and organogenesis. During gastrulation three germ layers are formed. The Ectoderm, mesoderm and Endoderm are formed and these are positioned by the migration of epithelial and mesenchymal cells. During organogenesis organs are formed by the germ layers.

    Cells migrate to form a specific organ. Organogenesis is the process happening right after the gastrulation. Cleavage is the process of division of cells without increasing its size. During this process cell migration doesn't happen. Hence all the other options except option D are incorrect.

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