Fig. 7. PIG-1 acts cell-autonomously to regulate the asymmetric division of the Q.p neuroblast. The numbers of AVM and PVM neurons were scored using zdIs5 [mec-4::gfp]; the number of lineages scored is shown in parentheses. Expression of pig-1 from the mab-5 promoter does not rescue the extra AVM phenotype of pig-1(gm344) but does rescue the extra PVM phenotype. Statistical analysis was performed using a one-tailed two-sample Z-test (using the normal approximation to the binomial distribution) by the StatCrunch program (www.statcrunch.com).