This paper investigates the syntax of coordinate structures in Korean. The proposed analysis is consistent with the direction taken by most current theories of coordination, which hold to the assumption that phrase structure is fundamentally asymmetric. The resemblance of syntactic asymmetries found in so-called Across-the-Board (ATB) questions to those found in parasitic gap constructions provides an empirical justification for the adjunction analysis advanced here, where a conjunction phrase koP (constituting the first conjunct plus the conjunctive suffix -ko) is assumed to be adjoined to the final conjunct. On this analysis, conjoined wh-questions in Korean are not so "across-the-board" as traditionally assumed; rather, there is only one A-bar movement chain, namely that of a null operator into Spec,koP. The proposed analysis departs in significant ways from Munn's (1993) adjunction analysis of English ATB sentences. Most significantly, the wh-phrase in Korean is analyzed to be base-generated in the left periphery and also to bind pro in the second conjunct. These differences are described as syntactic reflexes of more general typological differences between the two languages including word order and the (un)availability of pro. A particularly important consequence of the proposal is discussed, namely the reformulation of the Coordinate Structure Constraint as a kind of parallelism requirement on conjuncts, i.e., phrases of the same category/size (here, TPs).