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Using Avian Skin Explants to Study Tissue Patterning and Organogenesis

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Published on: September 15, 2023

Tissue strategies as developmental constraints: Implications for animal evolution.

¹Ellen Larsen is at the Dept of Zoology, University of Toronto, Toronto, Canada M5S IA1.

Trends in Ecology & Evolution

|January 18, 2011

Summary

Developmental constraints link genes, cell behavior, and evolution. This framework explains diverse phenomena like human appendage absence and the Cambrian explosion.

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Area of Science:

Evolutionary biology
Developmental biology
Genetics

Background:

Morphological evolution is influenced by genetic and cellular processes.
Understanding developmental constraints is key to explaining evolutionary patterns.

Purpose of the Study:

To explore the relationship between genes, cell behavior, and morphological evolution.
To provide a framework for understanding diverse evolutionary phenomena.

Main Methods:

Consideration of developmental constraints at the tissue level.
Analysis of the interplay between genetic factors and cell behavior.

Main Results:

A common framework linking genes, cell behavior, and morphological evolution was identified.
This framework explains phenomena such as the lack of homeotic appendages in humans.

Conclusions:

Developmental constraints at the tissue level offer a unifying explanation for evolutionary patterns.
The framework accounts for both the absence of specific structures and rapid diversification events like the Cambrian explosion.