Biology: How Life Works
3rd Edition
ISBN: 9781319017637
Author: James Morris, Daniel Hartl, Andrew Knoll, Melissa Michael, Robert Lue, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: Macmillan Higher Education
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Chapter 19.2, Problem 8SAQ
Summary Introduction
A gene which controls the anatomical structure development in several organisms is called as homeotic genes. Example, these occur in insects, plants, echinoderms, and mammals. The proteins that encoded by the homeotic genes are called as transcription factors. These cell leads the cells to make various body parts.
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Explain what a morphogen is, and describe how it exerts its effects. What do you expect will happen when a morphogen is expressed in the wrong place in an embryo? List five examples of morphogens that function in Drosophila.
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