( ( ( The phases ) ( of interphase ) ) ( ( are ( G1 ( , ( ( S and ) G2 ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS phases)) (PP (IN of) (NP (NN interphase)))) (VP (VBP are) (NP (NNP G1) (, ,) (NNP S) (CC and) (NNP G2))) (. .)))
The phases of interphase are G1, S and G2.
(ROOT (S (NP (DT The) (NNS chromosomes)) (VP (VB duplicate) (PP (IN in) (NP (DT the) (JJ interphase) (NN phase)))) (. .)))