( ( Since ( ( the DNA ) ( ( has already ) ( been ( duplicated ( during ( the interphase ) ) ) ) ) ) ) ( , ( ( each chromatid ) ( ( consists ( of ( ( two chromosomes ) ( connected ( by ( a centromere ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Since) (S (NP (DT the) (NN DNA)) (VP (VBZ has) (ADVP (RB already)) (VP (VBN been) (VP (VBN duplicated) (PP (IN during) (NP (DT the) (NN interphase)))))))) (, ,) (NP (DT each) (NN chromatid)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (NNS chromosomes)) (VP (VBN connected) (PP (IN by) (NP (DT a) (NN centromere))))))) (. .)))
Since the DNA has already been duplicated during the interphase, each chromatid consists of two chromosomes connected by a centromere.
(ROOT (S (NP (DT The) (NNS chromosomes)) (VP (VB duplicate) (PP (IN in) (NP (DT the) (JJ interphase) (NN phase)))) (. .)))