Regulating Genes for Metamorphosis: Concepts and Results

  • Judith H. Willis


The transformation of a drab caterpillar into a spectacular butterfly has fascinated mankind for millennia. That metamorphosis is regulated by only two classes of hormones, ecdysteroids and juvenoids, should excite the interest of biologists jaded by the complexity of embryonic development. While ecdysteroids drive a molt, it is the juvenoids that control the nature of the molt. In their absence metamorphosis ensues, in their presence the molt results in continuance of the “status quo”, with the insect forming a new instar similar to the previous one.


Juvenile Hormone Chromatin Domain Metamorphic Stage Cuticular Protein Tobacco Hornworm 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Judith H. Willis
    • 1
  1. 1.Department of EntomologyUniversity of IllinoisUrbanaUSA

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