( ( ( The ( composite populations ) ) ( can ( be ( regarded ( as ( ( heterogeneous mixtures ) ( of ( ( homozygous and ) ( ( genetically isolated ) lines ) ) ) ) ) ) ) ) ) ( , ( each ( ( represented ( by ( ( ( one or ) more ) individuals ) ) ) . ) ) ) )
(ROOT (S (S (NP (DT The) (JJ composite) (NNS populations)) (VP (MD can) (VP (VB be) (VP (VBN regarded) (PP (IN as) (NP (NP (JJ heterogeneous) (NNS mixtures)) (PP (IN of) (NP (NP (NNS homozygous)) (CC and) (NP (ADJP (RB genetically) (VBN isolated)) (NNS lines)))))))))) (, ,) (NP (DT each)) (VP (VBD represented) (PP (IN by) (NP (QP (CD one) (CC or) (JJR more)) (NNS individuals)))) (. .)))
The composite populations can be regarded as heterogeneous mixtures of homozygous and genetically isolated lines, each represented by one or more individuals.
(ROOT (S (NP (NNS Heterogeneous)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT a) (NN mixture)) (SBAR (WHNP (WDT that)) (S (VP (VBZ varies) (PP (IN in) (NP (PRP$ its) (NN composition)))))))))) (. .)))