When Mmus\Zfpm1^Scer\UAS.cFa is driven by Scer\GAL4^lz-gal4 a significant decrease in the average number of crystal cells is seen stage 13-16 embryos by 50%. About 23% of embryos have no detectable crystal cells. When Mmus\Zfpm1^Scer\UAS.cFa is driven by Scer\GAL4^twi.PB a reduction in the umber of cardiac cells is seen in embryos. An average of 40% of embryos have gaps in the heart tube ranging from 10 cells missing to a complete absence of cardiac cells. When Mmus\Zfpm1^Scer\UAS.cFa is driven by Scer\GAL4^ey.PH severe defects are seen in the eye. These include ectopic production of antennae, reduction or loss of the eye, disrupted ommatidial polarity. This combination is also lethal for about 80% of the population before eclosion.