Increased temperature or reduced cortical tension significantly suppress the embryonic lethality observed in the absence of FAMK-1. (A–C and F) Embryonic lethality analysis of the indicated conditions. (D and E) Analysis for the indicated conditions of multinucleation in embryos that express GFP::PH and mCherry::H2b markers. The strains used for the embryonic lethality analysis in F are the same strains as in D and E. All error bars are the SD; ****, P < 0.0001 (t test).