( ( ( Fraternal -LRB- ) ( dizygotic twins ) ) ( result when ) )
(ROOT (S (VP (VB Fraternal) (-LRB- -LRB-) (NP (JJ dizygotic) (NNS twins)) (S (VP (VB result) (FRAG (WHADVP (WRB when))))))))
Fraternal (dizygotic twins result when
(ROOT (S (ADVP (RB Fraternal)) (, ,) (NP (NN non-identical)) (VP (VBP are) (NP (NP (CD two) (JJ other) (NNS terms)) (PP (IN for) (NP (NP (JJ dizygotic) (NNS twins)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP make) (NP (JJ good) (NN study) (NNS subjects)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP share) (NP (NP (JJ many) (JJ environmental) (NNS conditions)) (, ,) (CONJP (CC but) (RB only)) (NP (NP (QP (RB about) (PDT half))) (PP (IN of) (NP (PRP$ their) (NNS polymorphisms))))))))))))))) (. .)))