Chapter 20, Problem 4SA

Summary Introduction

To determine:

Why expression of a homeotic genes in the wrong tissue in drosophila that result in the formation of wrong body part from that tissue and how the homeotic genes act as the positive regulator of developmental pathways.

Concept Introduction:

Homeotic genes are those genes which are responsible for the anatomical structures in different organisms such as insects. Mutation in the homeotic genes gives rise to a body part at different location and sometimes these displacements also causes the death of an organism. There are several forms of homeotic genes example, hox and parahox. Two types of mutations can occur in the homeotic genes of drosophila; first is Antennapedia and the other is Bithorax mutant.