preformationism


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Related to preformationism: Germ-Plasm Theory

preformationism

(ˌpriːfɔːˈmeɪʃənɪzəm)
n
(Biology) the belief in the theory of preformation

preformationism

the theory that an organism is fully formed at conception and that reproduction is thereafter simply a process of growth. — preformationist, n.
See also: Biology
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References in periodicals archive ?
Here the author shows his insider knowledge as a scientist who has done research in the field of epigenetics, which against genetic preformationism stresses the parallel developmental role of gene and environment.
Women who consider abortion a moral option do so because their understanding of pregnancy, and thus of abortion, rejects the genetic preformationism that leads others to see the embryo as a distinct individual from the time of conception.
Moss frames his remarkably dense 200-page essay in terms of two general concepts of genetics: preformationism, which in the extreme is embodied by genetic determinism, and epigenesis, which gives considerable leeway to the messages transcribed from genes to modulate the phenotype.