( ( ( ( This ( ( is ( in ( sharp contrast ) ) ) ( with ( ( the situation ) ( in ( ( ( many ( animal cells ) ) , ) ( ( in which ) ( ( ( the arms ) ( of ( the ( sister chromatids ) ) ) ) ( ( separate mostly ) ( at ( ( the end ) ( of ( prophase ( in ( M phase ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) but ) ( ( the ( centromeric cohesion ) ) ( is ( maintained ( until ( the ( metaphase-to-anaphase transition ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT This)) (VP (VBZ is) (PP (IN in) (NP (JJ sharp) (NN contrast))) (PP (IN with) (NP (NP (DT the) (NN situation)) (PP (IN in) (NP (NP (JJ many) (NN animal) (NNS cells)) (, ,) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT the) (NNS arms)) (PP (IN of) (NP (DT the) (JJ sister) (NNS chromatids)))) (VP (VBP separate) (ADVP (RB mostly)) (PP (IN at) (NP (NP (DT the) (NN end)) (PP (IN of) (NP (NP (NN prophase)) (PP (IN in) (NP (NNP M) (NN phase)))))))))))))))) (CC but) (S (NP (DT the) (JJ centromeric) (NN cohesion)) (VP (VBZ is) (VP (VBN maintained) (PP (IN until) (NP (DT the) (JJ metaphase-to-anaphase) (NN transition)))))) (. .)))
This is in sharp contrast with the situation in many animal cells, in which the arms of the sister chromatids separate mostly at the end of prophase in M phase but the centromeric cohesion is maintained until the metaphase-to-anaphase transition.
(ROOT (S (PP (IN During) (NP (DT the) (JJ anaphase) (NN phase))) (, ,) (S (NP (NN sister) (NNS chromatids)) (VP (VBP separate))) (CC and) (S (NP (DT the) (NNS centromeres)) (VP (VBP divide))) (. .)))