( ( Interphase ( pairing ( A ( weak ( chromosome ( pairing interaction ) ) ) ) ) ) ( ( ( occurs even ) ( in ( interphase cells ) ) ) . ) )
(ROOT (S (NP (NP (NNP Interphase)) (VP (VBG pairing) (NP (DT A) (JJ weak) (NN chromosome) (VBG pairing) (NN interaction)))) (VP (VBZ occurs) (ADVP (RB even)) (PP (IN in) (NP (JJ interphase) (NNS cells)))) (. .)))
Interphase pairing A weak chromosome pairing interaction occurs even in interphase cells.
(ROOT (S (NP (DT The) (NNS chromosomes)) (VP (VB duplicate) (PP (IN in) (NP (DT the) (JJ interphase) (NN phase)))) (. .)))