( ( Many genes ) ( ( have ( multiple ( ( -LRB- ( ( more ( than two ) ) -RRB- ) ) alleles ) ) ) . ) )
(ROOT (S (NP (JJ Many) (NNS genes)) (VP (VBP have) (NP (JJ multiple) (PRN (-LRB- -LRB-) (NP (QP (JJR more) (IN than) (CD two))) (-RRB- -RRB-)) (NNS alleles))) (. .)))
Many genes have multiple (more than two) alleles.
(ROOT (S (NP (NP (DT The) (NN majority)) (PP (IN of) (NP (JJ human) (NNS genes)))) (VP (VBP have) (NP (QP (CD two) (CC or) (JJR more)) (JJ possible) (NNS alleles))) (. .)))