Doe Quote by George Gaylord Simpson
“It is now firmly established that ontogeny does not repeat phylogeny”
About This Quote
Source Scientific Paper: "The Principles of Classification and a Review of Comparative Anatomy" (1944)
Ontogeny (development) does not repeat phylogeny (evolutionary history) exactly.
In simple terms: Development differs from evolutionary history.
Key Takeaway
Recognize differences between growth and evolution.
Themes
biology
evolution
development
Mood
analytical
educational
Type
scientific
academic
When to use this quote
- educational curricula
- research design
- public science communication
Key Concepts
Developmental biology
phylogenetics
comparative anatomy
Questions to Reflect On
- How does this principle affect evolutionary studies?
- Can exceptions to this rule inform new theories?
A Different Perspective
Oversimplification may ignore convergent evolution cases.
![“Phylogeny and ontogeny are, therefore, the two coordinated branches of morphology. Phylogeny is the developmental history [Entwickelungsgeschichte] of the abstract, genealogical individual; ontogeny, on the other hand, is the developmental history of the concrete, morphological individual.” quote by Ernst Haeckel](https://sms4smile.com/quotes/img-quotes/bfa/ernst-haeckel-20972_abstract_phylogeny-and-ontogeny-are-therefore-the_1640087.jpg)
