( ( ( ( ( An ( ( alternative ( to asexual ) ) reproduction ) ) , ) ( where ( ( the offspring ) ( are ( identical ( to ( the parent ) ) ) ) ) ) ) , ) ( ( is ( ( sexual reproduction ) ( where ( ( ( the ( genetic material ) ) ( from ( reproductive partners ) ) ) ( combines ( to ( produce offspring ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (ADJP (JJ alternative) (TO to) (JJ asexual)) (NN reproduction)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NN offspring)) (VP (VBP are) (ADJP (JJ identical) (PP (TO to) (NP (DT the) (NN parent))))))) (, ,)) (VP (VBZ is) (NP (NP (JJ sexual) (NN reproduction)) (SBAR (WHADVP (WRB where)) (S (NP (NP (DT the) (JJ genetic) (NN material)) (PP (IN from) (NP (JJ reproductive) (NNS partners)))) (VP (VBZ combines) (S (VP (TO to) (VP (VB produce) (NP (NN offspring)))))))))) (. .)))
An alternative to asexual reproduction, where the offspring are identical to the parent, is sexual reproduction where the genetic material from reproductive partners combines to produce offspring.
(ROOT (S (NP (JJ Sexual) (NN reproduction)) (VP (VBZ involves) (S (VP (VBG combining) (NP (JJ genetic) (NN material)) (PP (IN from) (NP (CD two) (NNS parents))) (S (VP (TO to) (VP (VB create) (NP (JJ distinct) (NN offspring)))))))) (. .)))