( ( Zygote ( -LRB- ( ( ( diploid , ) ( 46 chromosomes ) ) -RRB- ) ) ) ( ( forms ( 12 hours ) ) ( after fertilization ) ) )
(ROOT (S (NP (NP (NNP Zygote)) (PRN (-LRB- -LRB-) (NP (NN diploid)) (, ,) (NP (CD 46) (NNS chromosomes)) (-RRB- -RRB-))) (VP (VBZ forms) (NP (CD 12) (NNS hours)) (PP (IN after) (NP (NN fertilization))))))
Zygote (diploid, 46 chromosomes) forms 12 hours after fertilization
(ROOT (S (PP (IN In) (NP (NNS humans))) (, ,) (NP (DT a) (NN zygote)) (VP (VBZ has) (NP (CD 46) (NNS chromosomes))) (. .)))