BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
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.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
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.
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.
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
Chapter 19 Solutions
BIOLOGY
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...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- When comparing gene expression of the cells of the ICM and those of the trophoblast, which of the following is TRUE? a. Cells of the trophoblast express Nanog. b. Cells of the ICM and trophoblast will show the same gene expression pattern. c. ICM cells express Cdx2. d. Cells of the ICM express Oct 4arrow_forwardIn flies developing from eggs laid by a nanos−mother, development of the abdomen is inhibited.Flies developing from eggs that have no maternallysupplied hunchback mRNA are normal. Flies developing from eggs laid by a nanos− mother that alsohave no maternally supplied hunchback mRNA arenormal. If too much Hunchback protein accumulatesin the posterior of the egg, abdominal developmentis prevented.a. What do these findings say about the function ofthe Nanos protein and of the hunchback maternallysupplied mRNA?b. What do these findings say about the efficiency ofbiological processes that are subject to evolution?arrow_forwardWhich of the following does NOT pertain to the myoblast-determining gene 1?*a. It is a master gene.b. It is a silencing gene.c. It produces a transactivating protein.d. It activates its own gene. Gene silencing involves which type of histone modification?* a. acetylation of histone 4 b. dimethylation of histone 3 c. trimethylation of histone 4 d. trimethylation of histone 3 Given the required environment, the totipotency of the nucleus can allow which of the following?* a. a committed cell to undergo dedifferentiation b. a committed cell to undergo terminal differentiation c. a terminally differentiated cell to produce a complete organism d. a terminally differentiated cell to produce specific types of tissues An induced pluripotent cell is described by which of the following?* a. It is a committed cell that undergoes redifferentiation. b. It is a committed cell that undergoes dedifferentiation. c. It is a terminally…arrow_forward
- In the nematode C. elegans, some worms have blisteredcuticles due to a recessive mutation in one of the bligenes. Someone studying a suppressor mutation thatsuppressed bli-3 mutations wanted to know if it wouldalso suppress mutations in bli-4. They had a strain thatwas homozygous for this recessive suppressor mutation,and its phenotype was wild type.a. How would they determine whether this recessivesuppressor mutation would suppress mutations in bli-4?In other words, what is the genotype of the wormsrequired to answer the question?b. What cross(es) would they do to make these worms?c. What results would they expect in the F2 if(1) it did act as a suppressor of bli-4?(2) it did not act as a suppressor of bli-4?arrow_forwardIf a Drosophila larva is missing much of its posterior end it is likely due to a mutation che: A. maternal bicoid gene. B. zygotic bicoid gene. C. maternal nanos gene. D. zygotic nanos gene.arrow_forwardFor the Igf2 gene, where do de novo methylation and maintenancemethylation occur?a. De novo methylation occurs in sperm, and maintenancemethylation occurs in egg cells.b. De novo methylation occurs in egg cells, and maintenancemethylation occurs in sperm cells.c. De novo methylation occurs in sperm, and maintenancemethylation occurs in somatic cells of offspring.d. De novo methylation occurs in egg cells, and maintenancemethylation occurs in somatic cells of offspring.arrow_forward
- A researcher has identified a mutant strain of yeast whose histones are unable to be acetylated. Which of the following is the MOST reasonable prediction for how the phenotype of this mutant yeast will differ from the phenotype of yeast cells with acetylated histones? A. The mutant will grow more rapidly. B. The mutant will grow much more slowly. C. The mutant will show decreased levels of gene expression. D. The mutant will show increased levels of gene expression.arrow_forwardIn experiments in which rat embryo fibroblasts are transfected with suspected oncogenes, introduction of which of the following genes transform the cells (select one)? A. Myc alone B. H-Ras alone C. E1A alone D. Both Myc and E1A together E. Both Myc and H-Ras togetherarrow_forwardWhat factor does NOT contribute to establishment of the hunchback gradient in the Drosophila embryo? O a. maternal source of hunchback mRNA O b.nanos O c. bicoid O d. caudalarrow_forward
- You are a developmental geneticist studying flowering time variation in Arabidopsis. You perform a mutagenesis screen to identify mutants in the photoperiod pathway. You conduct the screen and find two different plants that show the same mutant phenotype. You then use a complementation test. What is the predicted outcome of this test if both phenotypes are caused by mutations in separate genes? recover the wild type phenotype overexpress the gene O recover the mutant phenotypearrow_forwardIn a female human cell, what would be the effect on X inactivation if SİRNAS that eliminate the products of the Tsix gene are added? Select one: a. One of the two X chromosomes would become inactivated. b. Both of the X chromosomes would become inactivated. c. Neither of the X chromosomes would become inactivated. d. Only the maternal X chromosome would become inactivated. e. Only the paternal X chromosome would become inactivated.arrow_forwardWhich of the following genes is transcribed in the Drosophila embryo? O a. bicoid O b. germ cell-less Oc. bindin d. even-skippedarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY