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Related Concept Videos

Gastrulation01:56

Gastrulation

Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...
Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Neurulation01:30

Neurulation

Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...

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Related Experiment Video

Updated: Jul 6, 2026

Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages
08:25

Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages

Published on: June 2, 2020

Patterning lessons from a dorsalized embryo.

Miriam I Rosenberg1, Claude Desplan

  • 1Center for Developmental Genetics, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003, USA.

Developmental Cell
|April 16, 2008
PubMed
Summary
This summary is machine-generated.

Beetles pattern their body axis using ancient self-organizing systems involving Dorsal and Dpp proteins, differing from fly development which relies on maternal factors.

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Area of Science:

  • Developmental biology
  • Evolutionary developmental biology
  • Insect development

Background:

  • Flies pattern their dorsoventral axis using maternal gene products.
  • The beetle Tribolium shares many developmental genes with flies.

Purpose of the Study:

  • To investigate the mechanisms of axis patterning in the beetle Tribolium.
  • To compare Tribolium axis patterning with that of flies.

Main Methods:

  • Comparative genomics
  • Gene expression analysis
  • Functional assays (implied)

Main Results:

  • Tribolium utilizes Dorsal and Dpp proteins for axis patterning.
  • Tribolium patterning relies on self-organizing systems, not maternal factors.
  • Shared genes are used in distinct developmental contexts.

Conclusions:

  • Insect axis patterning mechanisms are more diverse than previously thought.
  • Ancestral self-organizing systems play a key role in invertebrate development.
  • Evolutionary developmental biology reveals conserved genes with divergent functions.