“…For example, Beckett and Baylies (2007) carefully counted the number of nuclei found in distinct muscle precursors in many known fusion mutants. Among these, only in myoblast city (mbc) mutants (Rushton et al, 1995;Erickson et al, 1997;Galletta et al, 1999) no fusion occurs at all as has been reported previously (Doberstein et al, 1997;Schröter et al, 2004Schröter et al, , 2006Menon et al, 2005). Interestingly, in agreement with previously published data, Beckett and Baylies (2007) found different numbers of nuclei in blow, kette, schizo/loner, mbc, and rols mutants as well as states of fusion between the segments of the individual mutants and concluded that there are no genetic differences between the two-phases of myoblast fusion, but rather only a delay in the fusion process itself.…”