( Meiosis ( ( is ( completed ( after ( sperm penetration ) ) ) ) . ) )
(ROOT (S (NP (NNS Meiosis)) (VP (VBZ is) (VP (VBN completed) (PP (IN after) (NP (NN sperm) (NN penetration))))) (. .)))
Meiosis is completed after sperm penetration.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT a) (NN sperm)) (VP (VBZ penetrates) (NP (DT the) (NN egg))))) (, ,) (NP (PRP it)) (VP (VBZ triggers) (NP (DT the) (NN egg) (S (VP (TO to) (VP (VB complete) (NP (NNS meiosis))))))) (. .)))