BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 20.2, Problem 3CC
Summary Introduction
To determine: The
Introduction: A homeotic gene is a gene that regulates the fate of certain areas of an animal’s body. The Drosophila species has eight homeotic genes, which are present on the same chromosome but are grouped into two complexes: the Antennapedia complex and the bithorax complex.
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True or false about the following statements on Drosophila eye development
a. Hh, which is expressed by the developing photoreceptors in the posterior eye disc, induces cells in the morphogenetic furrow (MF) to express DPP, which is the ligand of DPP (BMP) signaling.
b. Wg inhibits while Hh and DPP promote the expression of Eya in the preproneural (PPN) domain anterior to the MF, which is essential for the induction of photoreceptor differentiation and movement of MF from posterior to anterior.
c. Eya (Eyes absent), sine oculis (so), Ey (Eyeless), and Eyg (Eygone) are the retinal determination (RD) network genes required for retinal determination and induction of atonal expression.
d. EGFR signaling is required for the differentiation of all the photoreceptor neurons. In addition EGFR signaling is also required for maintaining cell survival in posterior eye discs.
e. During Drosophila eye development, cell proliferation in the second mitotic wave is required to provide…
Chapter 20 Solutions
BIOLOGY-TEXT
Ch. 20.1 - 20.1 General Themes in Development Concept Check:...Ch. 20.1 - Prob. 2CCCh. 20.1 - Prob. 1CSCh. 20.2 - Development in Animals I: Pattern Formation...Ch. 20.2 - Development in Animals I: Pattern Formation...Ch. 20.2 - Prob. 3CCCh. 20.2 - Core Skill: Modeling The goal of this modeling...Ch. 20.2 - Development in Animals I: Pattern Formation Core...Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.3 - Development in Animals II: Cell Differentiation...
Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.4 - Development in Plants Concept Check: Where are...Ch. 20.4 - Prob. 2CCCh. 20 - The process whereby a cells morphology and...Ch. 20 - Prob. 2TYCh. 20 - Positional information is important in determining...Ch. 20 - Morphogens are a. molecules that disrupt normal...Ch. 20 - Prob. 5TYCh. 20 - Arrange the following phases of pattern formation...Ch. 20 - Prob. 7TYCh. 20 - Which of the following genes do not play a role in...Ch. 20 - An embryonic stem cell that can give rise to any...Ch. 20 - Prob. 10TYCh. 20 - Prob. 1CQCh. 20 - The MyoD gene in mammals plays a role in muscle...Ch. 20 - Prob. 3CQCh. 20 - Prob. 1COQCh. 20 - Is it possible for a phenotypically normal female...
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