The Drosophila life cycle Egg/ Embryo Prepupa ~ 1 day 1 day 1 day 2 days 5 days Adult (Imago)
20-H
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neThe life cycle of Drosophila melanogaster
Embryo 1st instarlarva
2nd instarlarva
3rd instar larva Pre-pupa
Pupa
modified after Riddiford, 19931 2 3 54 6 7 8 9 10
Adultfemale
days
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1 2 3 4 5 6 7 8 109 days
Tissue- and stage-specific responses to a systemic signal
Third instar larva Prepupa Pupa
0 hrspupariation 10 hrs
Histolysis:
Differentiation:
Remodeling:
Larval midgut Salivary gland
Anterior muscles Post. muscles
Imaginal discs
Central nervous system
Head eversion
20E 20E
Locations and Developmental Fates of Imaginal Discs and Imaginal Tissues in the ThirdInstar Larva of Drosophila
compartment HedgehogEngrailed
Compartmentalization and Anterior-Posterior Patterning in the Wing Disc
Dpp: Decapentaplegic