KnowraPreformationismLinked fromLinked fromThe 5 pages that link to Preformationism, each with the reason it gives.All 5Compared with 5EmbryologyCompared with: It opposed explanations in which embryonic form emerges through progressive development.Cleavage (embryology)Compared with: Cleavage observations challenged the idea that development merely enlarges a preformed body.Karl Ernst von BaerCompared with: Von Baer’s observations supported gradual development rather than a preformed miniature organism.History of geneticsCompared with: It opposed the idea that heredity combines contributions from both parents.Jan SwammerdamCompared with: Swammerdam’s account of development was later associated with preformationist interpretations of pre-existing structures.