Assertion: gametophyte's nucleus | /r/CapableOf | fertilize the egg
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Source sentences:
text: This behavior apparently is not dependent on the sporophytic maternal tissue or the choice of which sperm nucleus fertilizes the egg or the central cell because in in vitro fertilization systems (e.g., in maize), invariably fertilized eggs undergo embryo development (62, 64) and fertilized central cells undergo endosperm development (65).