( ( In ( a ( normal ( human cell ) ) ) ) ( there ( ( are ( ( 23 pairs ) ( of ( ( chromosomes , ) ( which ( ( makes ( ( a ( total ( of 23X2 ) ) ) ( = ( 46 chromosomes ) ) ) ) ( in total ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (JJ normal) (JJ human) (NN cell))) (NP (EX there)) (VP (VBP are) (NP (NP (CD 23) (NNS pairs)) (PP (IN of) (NP (NP (NNS chromosomes)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ makes) (S (NP (QP (DT a) (NN total) (IN of) (CD 23X2))) (VP (SYM =) (NP (CD 46) (NNS chromosomes)))) (PP (IN in) (NP (NN total)))))))))) (. .)))
In a normal human cell there are 23 pairs of chromosomes, which makes a total of 23X2= 46 chromosomes in total.
(ROOT (S (NP (DT A) (JJ normal) (JJ human) (NN liver) (NN cell)) (VP (VBZ has) (NP (NP (CD 23) (NNS pairs)) (PP (IN of) (NP (NNS chromosomes))))) (. .)))