1 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781265486297
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 19, Problem 5A
The genes that encode the morphogen gradients in Drosophila were all identified in mutant screens. A mutation that removes the gradient necessary for the A/P morphogen gradient would be expected to
a. affect the larvae but not the adult.
b. affect the adult but not the larvae.
c. be lethal and lead to an abnormal embryo.
d. produce replacement of one adult structure with another.
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The anterior structure of the Drosophila is promoted by which of the following events?*
a. nanos proteins block the transcription of the caudal gene.
b. caudal proteins promote the transcription of the bicoid gene.
c. bicoid proteins promote transcription of the hunchback gene.
d. hunchback proteins block the transcription of the caudal gene.
The posterior structures of the Drosophila is promoted by which of the following events?*
a. caudal proteins block the transcription of the bicoid gene.
b. bicoid proteins block transcription of the hunchback gene.
c. nanos proteins promote the transcription of the caudal gene.
d. hunchback proteins promote the transcription of the caudal gene.
What is the difference between a maternal-effect gene and a zygotic gene? Of the following genes that play a role in Drosophila development, which are maternal-effect genes and which are zygotic? Explain your answer.
A. nanos
B. Antp
C. bicoid
D. lab
Master regulatory genes play critical roles in development. Predict the MOST likely fate of a fly embryo where master regulatory genes were nonfunctional due to mutation.
A. Cell division would stop, and the embryo would halt development.
B. The embryo would be a collection of undifferentiated cells because they never get the message that will send them down a determination pathway.
C. The embryo would be a combination of differentiated and undifferentiated cells because, even in the absence of a functional master regulatory gene, some cells will differentiate on their own.
D. The embryo would continue to develop, but there is a high probability that some limbs may end up in the wrong place in the adult.
Chapter 19 Solutions
1 SEM ACC W/RAVEN CARDED
Ch. 19.1 - Prob. 1LOCh. 19.2 - Prob. 1LOCh. 19.2 - Prob. 2LOCh. 19.2 - Distinguish differences in cell division between...Ch. 19.3 - Prob. 1LOCh. 19.3 - Prob. 2LOCh. 19.3 - Prob. 3LOCh. 19.4 - Prob. 1LOCh. 19.4 - Prob. 2LOCh. 19.5 - Prob. 1LO
Ch. 19.5 - Describe D/V axis formation in Drosophila.Ch. 19.6 - Prob. 1LOCh. 19.6 - Prob. 2LOCh. 19.6 - Prob. 3LOCh. 19.7 - Prob. 1LOCh. 19.7 - Prob. 2LOCh. 19.7 - Prob. 3LOCh. 19 - What type of cells would develop if you injected...Ch. 19 - The sheep used for the donor nucleus had a...Ch. 19 - During development, cells become a. differentiated...Ch. 19 - Prob. 2UCh. 19 - Prob. 3UCh. 19 - Prob. 4UCh. 19 - Plant meristems a. are only present during...Ch. 19 - Prob. 6UCh. 19 - The process of nuclear reprogramming a. is a...Ch. 19 - What is the common theme in cell determination by...Ch. 19 - The process of reproductive cloning a. shows that...Ch. 19 - Prob. 3ACh. 19 - Prob. 4ACh. 19 - The genes that encode the morphogen gradients in...Ch. 19 - What would be the likely result of a mutation of...Ch. 19 - MADS-box, and Hox genes are a. found only in...Ch. 19 - The fate map for C. elegans (refer to figure 19.3)...Ch. 19 - Prob. 2SCh. 19 - You have generated a set of mutant embryonic mouse...Ch. 19 - Assume you have the factors in hand necessary to...
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