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Evo-Devo Evolution of animal design – Lecture 4 (Hox Genes)

Evo-Devo Evolution of animal design – Lecture 4 (Hox Genes)

Eddy De Roberts
2003-02

EVO-DEVO: Evolution of animal design – Lecture 4 Hox Genes Naturalists were interested in transformations of one region of the body into another, in order to explain the discontinuous jumps in body form found in the evolution of species. Changes of one body part into another were called homeotic transformations. The moth shown below has a leg transformed into a wing. In 1923 Bridges and Morgan isolated bithorax, a four-winged fly, showing that homeotic transformations had a genetic basis.

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