Movie 1.

Live imaging of embryos expressing Jupiter::GFP to visualize the microtubules and Histone::RFP to visualize the chromatin. Control embryo laid by a BicD heterozygous mother (BicD^null/+) expressing the reporter constructs and subjected to the same experimental conditions as BicD^mom females. After embryo collection and preparation for live imaging, control embryos were always found to be already in the first mitotic divisions and they proceeded through the mitotic divisions normally.