( ( The ( latest estimates ) ) ( ( are ( that ( ( ( ( ( a ( human cell ) ) , ) ( a ( eukaryotic cell ) ) ) , ) ( contains ( ( some 21,000 ) genes ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJS latest) (NNS estimates)) (VP (VBP are) (SBAR (IN that) (S (NP (NP (DT a) (JJ human) (NN cell)) (, ,) (NP (DT a) (JJ eukaryotic) (NN cell)) (, ,)) (VP (VBZ contains) (NP (QP (DT some) (CD 21,000)) (NNS genes)))))) (. .)))
The latest estimates are that a human cell, a eukaryotic cell, contains some 21,000 genes.
(ROOT (S (NP (DT A) (JJ single) (JJ human) (NN body) (NN cell)) (ADVP (RB typically)) (VP (VBZ contains) (NP (NP (NNS thousands)) (PP (IN of) (NP (NNS genes))))) (. .)))
A single human body cell typically contains thousands of genes.