Haeckel's Law of Recapitulation
German zoologist Ernst Haeckel famously—and inaccurately—uttered, "Ontogeny recapitulates phylogeny." While investigating the develop...
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Ontogeny and Phylogeny
Ontogeny refers to the development of an organism. With humans, ontogeny begins with the fertilized egg and continues through embryonic and fetal development, birth, maturation,...
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Biogenetic Law
The biogenetic law is also known as the recapitulation theory, or the law of recapitulation. The biogenetic law is epitomized in Ernst Haeckel's (1834-1919) phrase "ontogeny recapitulat...
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Ontogeny and Phylogeny
Ontogeny refers to the development of an organism. With humans, ontogeny begins with the fertilized egg and continues through embryonic and fetal development, birth, maturation,...
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Haeckel's Law of Recapitulation
Ontogeny and Phylogeny
Biogenetic Law