Editing Pangenesis (section)

=== De Vries ===
[[Hugo de Vries]] characterized his own version of pangenesis theory in his 1889 book ''Intracellular Pangenesis'' with two propositions, of which he only accepted the first:

:I. In the cells there are numberless particles which differ from each other, and represent the individual cells, organs, functions and qualities of the whole individual. These particles are much larger than the chemical molecules and smaller than the smallest known organisms; yet they are for the most part comparable to the latter, because, like them, they can divide and multiply through nutrition and growth. They are transmitted, during cell-division, to the daughter-cells: this is the ordinary process of heredity.
:II. In addition to this, the cells of the organism, at every stage of development, throw off such particles, which are conducted to the germ-cells and transmit to them those characters which the respective cells may have acquired during development.<ref>{{cite book |last=de Vries |first=Hugo |title=Intracellular Pangenesis |url=http://www.esp.org/books/devries/pangenesis/facsimile/ |access-date=May 2, 2015 |date=1910 |orig-year=1889 |page=63}}</ref>