Developmental parameters of the w; p[V2] strain compared with w. Egg hatch was determined for 50 eggs from each culture, and the remaining values were determined from 100 0–2 hour-old larvae carefully transferred to food vials without added yeast. Standard error of mean (SEM) given in parenthesis. Larval development time means compared by a Mann-Whitney test gave p=0.0104, a significant difference between the two strains. Chi-square tests for the egg hatch and survival values showed no difference (0.05 significance level, 1 df) between the two strains: χ= 0.044 for egg hatch, 0.05 for survival to pupariation, and 0.37 for survival to adult.