( ( ( The ( plastid DNA ) ) ( of ( the ( other parent ) ) ) ) ( ( ( ( ( is , ) thus ) , ) ( completely lost ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ plastid) (NN DNA)) (PP (IN of) (NP (DT the) (JJ other) (NN parent)))) (VP (VBZ is) (, ,) (ADVP (RB thus)) (, ,) (S (ADJP (RB completely) (VBN lost)))) (. .)))
The plastid DNA of the other parent is, thus, completely lost.
(ROOT (S (PP (IN Like) (NP (NN mitochondria))) (, ,) (NP (NNS plastids)) (VP (VBP contain) (NP (PRP$ their) (JJ own) (NN dna))) (. .)))