( ( If ( ( two species ) ( ( ( mate and ) produce ) ( a ( viable offspring ) ) ) ) ) ( , ( ( these offspring ) ( ( will ( be ( ( sterile due ) ( to ( ( the misalignment ) ( of ( the ( chromosome number ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (CD two) (NNS species)) (VP (VB mate) (CC and) (VB produce) (NP (DT a) (JJ viable) (NN offspring))))) (, ,) (NP (DT these) (NN offspring)) (VP (MD will) (VP (VB be) (ADJP (ADJP (JJ sterile) (JJ due)) (PP (TO to) (NP (NP (DT the) (NN misalignment)) (PP (IN of) (NP (DT the) (NN chromosome) (NN number)))))))) (. .)))
If two species mate and produce a viable offspring, these offspring will be sterile due to the misalignment of the chromosome number.
(ROOT (S (SBAR (IN If) (S (NP (CD two) (NNS populations)) (VP (VBP do) (RB not) (VP (VB mate) (CC and) (VB produce) (NP (ADJP (JJ fertile)) (NN offspring)))))) (, ,) (NP (JJ separate) (NNS species)) (VP (VBP result)) (. .)))