Summary
Fruit flies, zebrafish, mice and C. elegans reveal conserved developmental mechanisms.
In depth
Drosophila (genetics, patterning), C. elegans (cell lineage), zebrafish (transparent embryos), Xenopus (large eggs), chick (accessible embryo), mouse (mammalian genetics). Conservation lets findings translate.
Different systems have strengths: flies for genetics, frogs for biochemistry, chick for manipulation, mice for human relevance, zebrafish for live imaging. Findings are cross-checked in several.
Example: Notch was first found in fly mutants with notched wings.
Model organisms are chosen for ease of breeding and genetic manipulation. Drosophila melanogaster (fruit fly) revealed segmentation and Hox genes; C. elegans has a fully mapped cell lineage and transparent body; zebrafish embryos are transparent and develop outside the mother; mice have close genetic similarity to humans; Xenopus frogs have large eggs for manipulation; chick embryos are accessible for grafting.
Because developmental pathways are highly conserved, discoveries in one organism apply to others, such as Notch, Wnt and Hedgehog. Limitations include differences from humans, so findings must be validated.
Example: zebrafish screens find new genes for heart and eye disease.
Frequently asked questions
What is Model Organisms in Development?
Fruit flies, zebrafish, mice and C. elegans reveal conserved developmental mechanisms.
Which area of biology covers Model Organisms in Development, and how advanced is it?
Model Organisms in Development is one of the 54 topics in Developmental Biology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Embryo, Developmental Timing, Evo-Devo of Body Plans.
Why does Model Organisms in Development matter?
It justifies research on simple organisms.
Can you give an example of Model Organisms in Development?
The Pax6 gene of mice can induce eyes in flies.
What should I learn before Model Organisms in Development?
Work through the Beginner topics in Developmental Biology first, such as Fertilisation, Zygote, Embryo, then return to Model Organisms in Development. Advanced topics assume the Intermediate vocabulary.
What topics are related to Model Organisms in Development?
The closest topics to Model Organisms in Development are Embryo, Developmental Timing, Evo-Devo of Body Plans, Somites. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Model Organisms in Development?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Model Organisms in Development. To practise the whole of Developmental Biology, use the Developmental Biology quiz.
How is Model Organisms in Development different from Embryo?
Model Organisms in Development: Fruit flies, zebrafish, mice and C. elegans reveal conserved developmental mechanisms. Embryo: The early developmental stage of an organism produced by division of the zygote. Read both side by side and note what each one explains.
How should I study Model Organisms in Development step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Embryo and explain the difference aloud. Finally, take the Developmental Biology quiz and come back to this page for any question you miss.