ontogeny recapitulates phylogeny

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Related to phylogeny: Phylogenetic tree, Ontogeny recapitulates phylogeny

ontogeny recapitulates phylogeny

The now-discredited scientific theory that an organism's embryonic development, or ontogeny, follows the evolutionary stages of its species, or phylogeny. We were able to disprove Haeckel's theory that ontogeny recapitulates phylogeny by closely studying embryonic development.