( Humans ( ( have ( ( 46 chromosomes ) ( arranged ( in ( 23 pairs ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Humans)) (VP (VBP have) (NP (NP (CD 46) (NNS chromosomes)) (VP (VBN arranged) (PP (IN in) (NP (CD 23) (NNS pairs)))))) (. .)))
Humans have 46 chromosomes arranged in 23 pairs.
(ROOT (S (NP (NNS Humans)) (VP (VBP have) (NP (NP (CD 23) (JJ pairs) (NNS pairs)) (PP (IN of) (NP (NNS chromosomes))))) (. .)))