( Often ( ( ( first letter ) ( of ( allele name ) ) ) ( ( ( is uppercase ) ( if ( it ( is ( ( ( ( dominant , ) lower ) ( case if ) ) recessive ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Often)) (NP (NP (JJ first) (NN letter)) (PP (IN of) (NP (JJ allele) (NN name)))) (VP (VBZ is) (ADJP (JJ uppercase)) (SBAR (IN if) (S (NP (PRP it)) (VP (VBZ is) (ADJP (ADJP (JJ dominant)) (, ,) (ADJP (JJR lower)) (ADVP (NN case) (IN if)) (ADJP (JJ recessive))))))) (. .)))
Often first letter of allele name is uppercase if it is dominant, lower case if recessive.
(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))))) (. .)))