( Chromosomes ( ( ( replicate ( in Interphase ) ) ( to ( produce ( two ( sister chromatids ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Chromosomes)) (VP (VBD replicate) (PP (IN in) (NP (NNP Interphase))) (S (VP (TO to) (VP (VB produce) (NP (CD two) (NN sister) (NNS chromatids)))))) (. .)))
Chromosomes replicate in Interphase to produce two sister chromatids .
(ROOT (S (NP (DT The) (NNS chromosomes)) (VP (VB duplicate) (PP (IN in) (NP (DT the) (JJ interphase) (NN phase)))) (. .)))