( ( Pedigrees ( use ( ( a ( standardized set ) ) ( of symbols ) ) ) ) ( , ( squares ( ( represent ( ( ( males and ) circles ) ( represent females ) ) ) . ) ) ) )
(ROOT (S (S (NP (NNS Pedigrees)) (VP (VBP use) (NP (NP (DT a) (JJ standardized) (NN set)) (PP (IN of) (NP (NNS symbols)))))) (, ,) (NP (NNS squares)) (VP (VBP represent) (SBAR (S (NP (NNS males) (CC and) (NNS circles)) (VP (VBP represent) (NP (NNS females)))))) (. .)))
Pedigrees use a standardized set of symbols, squares represent males and circles represent females.
(ROOT (S (PP (IN In) (NP (DT a) (JJ pedigree) (NN chart))) (NP (DT the) (NNS squares) (NN shape)) (VP (VBZ symbolizes) (NP (NNS males))) (. .)))