( gametes ( ( Haploid ( ( reproductive cells ) ( -LRB- ( ( ( ovum and ) sperm ) -RRB- ) ) ) ) . ) )
(ROOT (S (NP (NNS gametes)) (VP (VBD Haploid) (NP (NP (JJ reproductive) (NNS cells)) (PRN (-LRB- -LRB-) (NP (NP (NN ovum)) (CC and) (NP (NN sperm))) (-RRB- -RRB-)))) (. .)))
gametes Haploid reproductive cells ( ovum and sperm ).
(ROOT (S (SBAR (IN While) (S (NP (NNS spermatogenesis)) (VP (VBZ produces) (NP (CD four) (JJ haploid) (NN sperm) (NNS cells))))) (, ,) (NP (NNS oogenesis)) (VP (VBZ produces) (NP (CD one) (JJ mature) (NN ovum))) (. .)))