ESSENTIALS OF GENETICS-W/MOD.ACCESS
9th Edition
ISBN: 9780134452876
Author: KLUG
Publisher: PEARSON
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Chapter 20, Problem 12PDQ
The homeotic mutation Antennapedia causes mutant Drosophila to have legs in place of antennae and is a dominant gain- of-function mutation. What are the properties of such mutations? How does the Antennapedia gene change antennae into legs?
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The homeotic mutation Antennapedia causes mutant Drosophila to have legs in place of antennae and is a dominant gain of-function mutation. What are the properties of such mutations?How does the Antennapedia gene change antennae into legs?
The homeotic mutation Antennapedia causes mutant Drosophila to have legs in place of antennae and is a dominant gain-of-function mutation. List all the properties of such mutations. How does the Antennapedia gene change antennae into legs?
What was used in experiments to induce mutations in Drosophila in the 1920s? What is Drosophila? Search online. X-rays was used in the experiment To induce mutations
Chapter 20 Solutions
ESSENTIALS OF GENETICS-W/MOD.ACCESS
Ch. 20 -
CASE STUDY |One foot or another
In humans the...Ch. 20 - CASE STUDY| One foot or another In humans the HOXD...Ch. 20 - CASE STUDY| One foot or another In humans the HOXD...Ch. 20 - HOW DO WE KNOW? In this chapter, we have focused...Ch. 20 - Review the Chapter Concepts list on page 403. Most...Ch. 20 -
3. Nuclei from almost any source may be injected...Ch. 20 -
4. Distinguish between the syncytial blastoderm...Ch. 20 - (a) What are maternal-effect genes? (b) When are...Ch. 20 - (a) What are zygotic genes, and when are their...Ch. 20 - List the main classes of zygotic genes. What is...
Ch. 20 -
8. Experiments have shown that any nuclei placed...Ch. 20 - How can you determine whether a particular gene is...Ch. 20 -
10. You observe that a particular gene is being...Ch. 20 - What are Hox genes? What properties do they have...Ch. 20 -
12. The homeotic mutation Antennapedia causes...Ch. 20 - The Drosophila homeotic mutation spineless...Ch. 20 - A number of genes that control expression of Hox...Ch. 20 - In Arabidopsis, flower development is controlled...Ch. 20 - Prob. 16PDQCh. 20 - Dominguez et al. (2004) suggest that by studying...
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- What is the signaling pathway that mediates the organizing activity of the A/P organizer in the Drosophila wing disc? Describe two experiments that suggest this pathway functions to organize pattern and promote growth along the anterior/posterior axis of wing imaginal discs.arrow_forwardCompare and contrast the experimental advantages and disadvantages of Drosophila, C. elegans, mammals, and Arabidopsis.arrow_forwardFor the first experiment ever on Drosophila mutations. Answer the following questions. a. What is the title of the first published paper explained the experiment and what is the name of the Author? b. What is the first mutation discovered in Drosophila? c. Explain the changes in the Drosophila yellow mutant (Y)compared to wild type.arrow_forward
- In the gene in the fruit fly (Drosophila) called antennepedia. It controls the formation of which structures? What happens when it is mutated?arrow_forwardIn flies, the gap gene kruppel is expressed in a broad band in the middle of the embryo with giant expressed as its anterior border and knirps at its posterior border. How is the expression of kruppel limited to this band in the embryo? Describe the spatial regulation of the kruppel gene.arrow_forwardThe 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.arrow_forward
- How have we discovered that specific genes control development in an organism like Drosophila?arrow_forwardWhat is positional information? Discuss three different ways that cells obtain positional information. Which of these three ways do you think is the most important for the formation of a segmented body pattern in Drosophila?arrow_forwardAnalysis of Hunchback mRNA expression tells us what about Hunchback gene expression? That the Hunchback gene is always on That the Hunchback gene is not expressed in the fruit fly That the Hunchback gene is turned on and off during development Nothingarrow_forward
- If a mutation in a homeotic gene produced the following phenotypes, would you expect it to be a loss-of-function or a gain-offunction mutation? Explain your answer. A. An abdominal segment has antennae attached to it. B. The most anterior abdominal segment resembles the most posterior thoracic segment. C. The most anterior thoracic segment resembles the most posterior abdominal segment.arrow_forwardBriefly describe how the bicoid and nanos genes help to determine the anterior–posterior axis of the fruit fly.arrow_forwardPrior to the work described here, what was the original purpose ofMorgan’s experiments with Drosophila?arrow_forward
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