( ( ( or in ) ( in vivo ) ) ( ( assays ( using ( ( ( ( ( ( mouse ( germinal ( cell chromosomes ) ) ) , ) ( Chinese ( hamster ( bone ( marrow chromosomes ) ) ) ) ) , ) and ) ( the ( Drosophila ( sex-linked ( recessive ( lethal ( trait gene ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (QP (CC or) (IN in))) (PP (IN in) (NP (NN vivo)))) (VP (VBZ assays) (S (VP (VBG using) (NP (NP (NN mouse) (NN germinal) (NN cell) (NNS chromosomes)) (, ,) (NP (JJ Chinese) (NN hamster) (NN bone) (NN marrow) (NNS chromosomes)) (, ,) (CC and) (NP (DT the) (NNP Drosophila) (JJ sex-linked) (JJ recessive) (JJ lethal) (NN trait) (NN gene)))))) (. .)))
or in in vivo assays using mouse germinal cell chromosomes, Chinese hamster bone marrow chromosomes, and the Drosophila sex-linked recessive lethal trait gene.
(ROOT (S (NP (JJ Sex-linked) (NNS traits)) (VP (VBP are) (VP (VBN located) (PP (IN on) (NP (NP (NNS genes)) (PP (IN on) (NP (NN sex) (NNS chromosomes))))))) (. .)))