During organ differentiation in Drosophila, an organ is modified to another organ (such as wings may

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During organ differentiation in Drosophila, an organ is modified to another organ (such as wings may be replaced by legs ). Genes responsible for such metamorphosis are called

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Homeotic genes are control genes which either by getting expressed or remaining silent during development, influence the differentiation of organs. These have been found in insects, one nematode and some plants. A DNA sequence called homeobox, preent in these genes, is involved in specification of organs. A mutation that causes a body part to develop in appeopriate position in an organism, is called homeotic mutation eg, in Drosophila, such muta tion may cause legs to develop on the head in place of antennae.

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