29.1 Introduction 29.2 Fly development uses a cascade of transcription factors 29.3 A gradient must be converted into discrete compartments 29. 4 Maternal gene products establish gradients in early embryogenesis 29.5 Anterior development uses localized gene regulators 29.6 Posterior development uses another localized regulator 29.7 How are mRNAS and proteins transported and localized? 29.8 Dorsal-ventral development uses localized receptor-ligand interactions 29.9TGFb/BMPS are diffusible morphogens 29. 10 Cell fate is determined by compartments that form by the blastoderm stage 29. 11 The wingless/wnt signaling pathway 29. 12 Complex loci are extremely large and involved in regulation 29. 13 The homeobox is a common coding motif in homeotic genes 消当29.1 Introduction 29.2 Fly development uses a cascade of transcription factors 29.3 A gradient must be converted into discrete compartments 29.4 Maternal gene products establish gradients in early embryogenesis 29.5 Anterior development uses localized gene regulators 29.6 Posterior development uses another localized regulator 29.7 How are mRNAs and proteins transported and localized? 29.8 Dorsal-ventral development uses localized receptor-ligand interactions 29.9 TGFb/BMPs are diffusible morphogens 29.10 Cell fate is determined by compartments that form by the blastoderm stage 29.11 The wingless/wnt signaling pathway 29.12 Complex loci are extremely large and involved in regulation 29.13 The homeobox is a common coding motif in homeotic genes