Question

In Drosophila, during organ differentiation, one organ can be replaced by another like wings by legs. Genes responsible for it are

• A. Plastid genes
• B. Homeotic genes
• C. Complementary genes
• D. Supplementary genes

Answer 1

The correct option is B Homeotic genes

Homeotic genes are controll genes which either by getting expressed or by 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, present in these genes is involved in the specification of organs. A mutation that causes a body part to develop in an appropriate position in an organism is called homeotic mutation e.g., in Drosophila, such mutation may cause legs to develop on the head in place of antennae.

So, the correct answer is 'Homeotic genes'.