Cellular blastoderm-fate of each region has been determined Parasegments >14 5 j6 7 j8 j9 poM132j13 1 Embryo at 10 hours-segments have developed Anterior part of T2 Posterior part of T1 Segments T1T2|T3|A1 A3 VAAVAS\A6 VATA Adult fly has 3 thoracic segments 8 abdominal segments