( Z ( ( represents ( ( all ( the ( uppercase letters ) ) ) ( of ( the ( Roman alphabet ) ) ) ) ) ; ) )
(ROOT (S (NP (NNP Z)) (VP (VBZ represents) (NP (NP (PDT all) (DT the) (JJ uppercase) (NNS letters)) (PP (IN of) (NP (DT the) (NNP Roman) (NN alphabet))))) (: ;)))
Z represents all the uppercase letters of the Roman alphabet;
(ROOT (S (SBAR (WHADVP (WRB When)) (S (VP (VBD represented) (PP (IN by) (NP (DT a) (JJ single) (NN letter)))))) (, ,) (NP (JJ dominant) (NNS alleles)) (VP (VBP are) (VP (VBN represented) (PP (IN by) (NP (JJ uppercase) (NNS letters))))) (. .)))