ontogeny recapitulates phylogeny

Etymology
Reportedly coined by zoologist Ernst Haeckel (1834-1919).

Proverb

 * 1)  The physical, cultural, moral, or intellectual development of each individual passes through stages similar to the developmental stages of that individual's species, society, or civilization. Not taken literally since the late 19th century.
 * 2) * 1905, J. A. Harris, "The Importance of Investigations of Seedling Stages," Science, New Series, vol. 22, no. 554, p. 186:
 * With reference to seedling stages the statement that ontogeny recapitulates phylogeny must be made with great reserve.