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Morphogenic Movements
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Types of morphogenic movements, SYLLABUS OF Zoo-LS-DSC-06
• UNIT - I Cell Division and Differentiation 06 Hours
• Types of animal cells and tissues, Mitosis, meiosis, Cell cycle regulation, Cell-cell
• communication, Stem cells, Differential gene expression.
• UNIT- II: Scope and History of Developmental Biology 03 Hours
• Historical perspective including contributions by eminent scientists and landmark
• experiments in the field of Developmental Biology, Concepts of Epigenesis, Preformation,
• Von Baer laws.
• UNIT- III: Early Embryonic Development 15 Hours
• Gametogenesis: Spermatogenesis and Oogenesis in mammals; Types of Eggs and Egg
• membranes Fertilization: External (amphibians) and Internal (mammals), Fast and slow
• blocks to Polyspermy; Types and Patterns of cleavage; Types of morphogenetic movements;
• Early development of frog and chick up to gastrulation. Fate maps
• UNIT- IV: Late Embryonic Development 04 Hours
• Fate of Germ Layers; Formation of neural tube, Extra-embryonic membranes in birds
, Introduction
• The migration of cells of organ-specific areas from the surface of blastula
to their prospective position is the most important event of gastrulation.
• These movements of cells are described as formative movements or
morphogenetic movements, because such movements help in
morphogenesis (development of a particular structural pattern).
• •The morphogenetic movements occur during blastulation, gastrulation
and neurulation stages.
• •All the morphogenetic movements can be grouped broadly in to two
basic categories:(1)-Epiboly (2)-Emboly
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