( ( ( ( Human ( diploid ( cells ( have ( 46 chromosomes ) ) ) ) ) and ) ( ( ( human ( haploid gametes ) ) ( -LRB- ( ( ( egg and ) sperm ) -RRB- ) ) ) ( have ( 23 chromosomes ) ) ) ) . )
(ROOT (S (S (NP (NNP Human)) (VP (VBD diploid) (SBAR (S (NP (NNS cells)) (VP (VBP have) (NP (CD 46) (NNS chromosomes))))))) (CC and) (S (NP (NP (JJ human) (JJ haploid) (NNS gametes)) (PRN (-LRB- -LRB-) (NP (NP (NN egg)) (CC and) (NP (NN sperm))) (-RRB- -RRB-))) (VP (VBP have) (NP (CD 23) (NNS chromosomes)))) (. .)))
Human diploid cells have 46 chromosomes and human haploid gametes (egg and sperm) have 23 chromosomes.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD 46) (NNS chromosomes) (NNS chromosomes)) (PP (IN in) (NP (DT a) (JJ diploid) (JJ human) (NN cell))))) (. .)))