The Collaborative International Dictionary
Syngenesis
Syngenesis \Syn*gen"e*sis\, n. [Pref. syn- + genesis.] (Biol.) A theory of generation in which each germ is supposed to contain the germs of all subsequent generations; -- the opposite of epigenesis.
Wiktionary
syngenesis
n. 1 (context genetics English) The genetic origin of an individual derived from material from both parents (by sexual reproduction) 2 descent from a common ancestor