( ( ( D ( chromosome interactions ) ) ( in ( the ( Drosophila ( interphase nucleus ) ) ) ) ) . )
(ROOT (NP (NP (NNP D) (NN chromosome) (NNS interactions)) (PP (IN in) (NP (DT the) (NNP Drosophila) (NN interphase) (NN nucleus))) (. .)))
D chromosome interactions in the Drosophila interphase nucleus.
(ROOT (S (NP (DT The) (NNS chromosomes)) (VP (VB duplicate) (PP (IN in) (NP (DT the) (JJ interphase) (NN phase)))) (. .)))