The insects which have two wings are classified as dipterans. Dipterans are supposed to evolve from a four − winged ancestor that had wings on both T2 and T3 thoracic segments, as present in butterflies and dragonflies. Provide the description on evolutionary condition for the evolution of dipterans from four − winged ancestors. Also identify the type of mutations results in two wing development in the butterfly. Introduction: Drosophila is a model organism for the study of development. It has a well studied genome sequence. Multiple genes are involved in the development of drosophila. Hox gene product functions as a transcription factor for homeobox gene (ultrabithorax and Antennapedia gene complex). In Drosophila, antennapedia is a hox gene that controls the formation of legs during development. It consists of five hox genes which work in combination for the development of cephalic and thoracic parasegments. Bithorax complex is a group of homeotic genes that regulator the differentiation of abdominal and post thoracic segments.

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Chapter 20, Problem 27P

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The insects which have two wings are classified as dipterans. Dipterans are supposed to evolve from a four − winged ancestor that had wings on both T2 and T3 thoracic segments, as present in butterflies and dragonflies. Provide the description on evolutionary condition for the evolution of dipterans from four − winged ancestors. Also identify the type of mutations results in two wing development in the butterfly.

Introduction:

Drosophila is a model organism for the study of development. It has a well studied genome sequence. Multiple genes are involved in the development of drosophila. Hox gene product functions as a transcription factor for homeobox gene (ultrabithorax and Antennapedia gene complex). In Drosophila, antennapedia is a hox gene that controls the formation of legs during development. It consists of five hox genes which work in combination for the development of cephalic and thoracic parasegments. Bithorax complex is a group of homeotic genes that regulator the differentiation of abdominal and post thoracic segments.

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