Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 17TYK
What would be the fate of a Drosophila larva that inherits two copies of a mutant bicoid gene (one mutant allele from each heterozygous parent)?
- a. It develops two heads, one at each end of the larva.
- b. It develops two tails, one at each end of the larva.
- c. It develops normally but, if female, produces mutant larvae that have two tail regions.
- d. It develops into an adult with legs growing out of its head.
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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.
In an embryo from a homozygous Bicoid mutant female,which class(es) of gene expression is (are) abnormal?a. Gap genesb. Pair-rule genesc. Segment-polarity genesd. Hox genes
Why are multiple copies of the X chromosome tolerated?
A.
Genes on the X chromosome are not expressed during development.
B.
The extra copies of the X chromosome are inactivated.
C.
There are no genes on the X chromosome that are detrimental when present in multiple copies
D.
The X chromosome only encodes sex related genes
Chapter 18 Solutions
Study Guide for Campbell Biology
Ch. 18 - In the following diagram of the lac operon, an...Ch. 18 - a. Repressible enzymes usually function in _____...Ch. 18 - a. Give an example of highly methylated and...Ch. 18 - Label the components of the following diagram that...Ch. 18 - a. How is the process of alternate RNA splicing...Ch. 18 - a. Describe how miRNAs regulate gene expression....Ch. 18 - a. What is the difference between determination...Ch. 18 - What type of evidence established that Bicoid...Ch. 18 - a. List three genetic changes that can convert a...Ch. 18 - Complete the following concept map to help you...
Ch. 18 - Fill in the following table to help you organize...Ch. 18 - Prob. 3SYKCh. 18 - Prob. 1TYKCh. 18 - Prob. 2TYKCh. 18 - Prob. 3TYKCh. 18 - Prob. 4TYKCh. 18 - Prob. 5TYKCh. 18 - DNA methylation of cytosine bases a. initiates the...Ch. 18 - Which of the following is not true of enhancers?...Ch. 18 - Prob. 8TYKCh. 18 - A eukaryotic gene typically has all of the...Ch. 18 - Prob. 10TYKCh. 18 - Prob. 11TYKCh. 18 - Which of the following statements explains why a...Ch. 18 - Prob. 13TYKCh. 18 - Prob. 14TYKCh. 18 - Prob. 15TYKCh. 18 - Prob. 16TYKCh. 18 - What would be the fate of a Drosophila larva that...Ch. 18 - Prob. 18TYKCh. 18 - Prob. 19TYKCh. 18 - Prob. 20TYKCh. 18 - Prob. 21TYKCh. 18 - Prob. 22TYKCh. 18 - Prob. 23TYKCh. 18 - Which of the following would most likely account...
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- In the haplodiploid system of sex determination in honey bees: a. homozygosity at the csd locus results in male-specific mRNA from the fem and Am-dsx genes, ultimately resulting in the development of an inviable diploid drone. b. the csd gene codes for CSD proteins, which splice the mRNA from the hunchback and gurken genes into female specific RNAs that code for female specific proteins. c. heterozygosity at the csd locus results in mRNA from the fem gene being spliced into femF which is transcribed into active FEM proteins that establish a positive feedback splicing loop that contributes to the development of a diploid female. d. heterozygosity for the Am-dsx gene results in mRNAs that ultimately contribute to the development of an aggressive, dominant queen, whereas homozygosity for the Am-dsx gene results mRNAs that contribute to the development of a subordinate, non-aggressive sterile worker. e. all of these are correct f. a & c g. b & darrow_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_forwardIn the lab, you discover two yeast haploid mutants that cannot produce arginine. You cross them together and the resulting diploid produces arginine. If producing arginine is the wild type phenotype, what can you definitively conclude? A.The haploid strains have identical mutations in the same genes. B.The haploid strains have identical mutations in different genes. C.The haploid strains have mutations in different genes. D.The haploid strains have mutations in the same gene. E.The haploid strains must belong to the complementation group encoding the first enzyme in the biosynthetic pathway.arrow_forward
- In comparison to experimental results from the genetic manipulation of an invertebrate model, what pathologic outcome(s) would suggest that multiple homologs of a disease gene are present in humans? a. Missing the essential gene homolog that is lethal in fruit flies is also lethal in human infants. b. Different homologs of the essential gene are each expressed in different human organs, and mutations in these duplicated genes cause organ-specific diseases. c. Different homologs of the essential gene are each expressed in different stages of early child development, and mutations in each of these duplicated genes cause different diseases. d. In humans, defects in different homologs of the essential gene cause different loss-of-function diseases due to subfunctionalization. e. The essential gene is lethal in fruit flies, but there is no disease phenotype exhibited in people.arrow_forwardBefore Muller's discovery that radiation induces mutation, scientists had to work on spontaneous mutants that were found solely by phenotype differences in natural populations. Which of the features of Drosophila made it a fortuitous choice for Morgan and his colleagues? a. large number of visible phenotypes b. especially high rate of mutation c. both sexual and asexual reproduction d. having a long life cycle e. well-known biochemical pathwaysarrow_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
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