( ( Human beings ) ( ( ( ( have ( 46 chromosomes ) ) , ) ( arranged ( in ( 23 pairs ) ) ) ) . ) )
(ROOT (S (NP (NNP Human) (NNS beings)) (VP (VBP have) (NP (CD 46) (NNS chromosomes)) (, ,) (VP (VBN arranged) (PP (IN in) (NP (CD 23) (NNS pairs))))) (. .)))
Human beings have 46 chromosomes, arranged in 23 pairs.
(ROOT (S (NP (NNS Humans)) (ADVP (RB typically)) (VP (VBP have) (NP (NP (CD 23) (JJ pairs) (NNS pairs)) (PP (IN of) (NP (NNS chromosomes))))) (. .)))
Humans typically have 23 pairs pairs of chromosomes.