( ( ( The ( best studied ) ) ( of ( these genes ) ) ) ( ( are ( ( the ( floral ( homeotic genes ) ) ) ( that ( control ( ( floral ( organ identity ) ) ( -LRB- ( ( ( sepal , ) ( petal ( , ( ( stamen or ) carpel ) ) ) ) -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJS best) (NN studied)) (PP (IN of) (NP (DT these) (NNS genes)))) (VP (VBP are) (NP (NP (DT the) (JJ floral) (JJ homeotic) (NNS genes)) (SBAR (WHNP (WDT that)) (S (VP (VBP control) (NP (NP (JJ floral) (NN organ) (NN identity)) (PRN (-LRB- -LRB-) (NP (NP (NN sepal)) (, ,) (NP (NN petal) (, ,) (NN stamen) (CC or) (NN carpel))) (-RRB- -RRB-)))))))) (. .)))
The best studied of these genes are the floral homeotic genes that control floral organ identity (sepal, petal, stamen or carpel).
(ROOT (S (S (NP (NP (NNS Sepals)) (, ,) (NP (NNS petals)) (, ,)) (VP (VBZ stamens))) (, ,) (CC and) (S (NP (NNS carpels)) (VP (VBP are) (NP (JJ floral) (NNS organs)))) (. .)))