Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 26, Problem 13CONQ
Discuss the role of homeotic genes in development. Explain what happens to the
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Discuss the role of homeotic genes in development. Explain what happens to the phenotype of a fruit fly when a gain-of-function mutation in a homeotic gene causes the protein to be expressed in an abnormal region of the embryo. What are the consequences of a loss-of-function mutation in such a gene?
Explain the importance of differential gene expression in development
Compare and contrast how maternal-effect genes, gap genes, and homeotic genes affect Drosophila development.
Chapter 26 Solutions
Genetics: Analysis and Principles
Ch. 26.1 - Prob. 1COMQCh. 26.1 - Prob. 2COMQCh. 26.1 - Which of the following is the correct order for...Ch. 26.2 - Prob. 1COMQCh. 26.2 - Prob. 2COMQCh. 26.2 - Prob. 3COMQCh. 26.2 - Prob. 4COMQCh. 26.3 - Prob. 1COMQCh. 26.3 - Prob. 2COMQCh. 26.3 - 3. Myogenic bHLH proteins are ___________ that...
Ch. 26.4 - Prob. 1COMQCh. 26.4 - Prob. 2COMQCh. 26.5 - 1. A key event that initially determines female or...Ch. 26.5 - Prob. 2COMQCh. 26 - 1. What four types of cellular processes must...Ch. 26 - Prob. 2CONQCh. 26 - Prob. 3CONQCh. 26 - 4. Which of the following statement(s) is/are true...Ch. 26 - Discuss the morphological differences between the...Ch. 26 - Prob. 6CONQCh. 26 - Explain what a morphogen is, and describe how it...Ch. 26 - 8. What is positional information? Discuss three...Ch. 26 - Prob. 9CONQCh. 26 - Prob. 10CONQCh. 26 - 11. Describe the function of the Bicoid protein....Ch. 26 - With regard to development, what are the roles of...Ch. 26 - Discuss the role of homeotic genes in development....Ch. 26 - Describe the molecular features of the homeobox...Ch. 26 - What would you predict to be the phenotype of...Ch. 26 - Prob. 16CONQCh. 26 - If a mutation in a homeotic gene produced the...Ch. 26 - 18. Explain how loss-of-function mutations in the...Ch. 26 - What is the difference between a maternal-effect...Ch. 26 - Prob. 20CONQCh. 26 - Prob. 21CONQCh. 26 - Prob. 22CONQCh. 26 - 23. Discuss the similarities and differences...Ch. 26 - 24. What is cell differentiation? Discuss the role...Ch. 26 - Prob. 25CONQCh. 26 - What is a totipotent cell? In each of the...Ch. 26 - 27. What is a meristem? Explain the role of...Ch. 26 - Prob. 28CONQCh. 26 - Predict the phenotypic consequences of each of the...Ch. 26 - 30. Explain how alternative splicing affects sex...Ch. 26 - Prob. 1EQCh. 26 - Compare and contrast the experimental advantages...Ch. 26 - 3. What is meant by the term cell fate? What is a...Ch. 26 - 4. Explain why a cell lineage diagram is necessary...Ch. 26 - Explain the rationale behind the use of the bag of...Ch. 26 - Prob. 6EQCh. 26 - Take a look at question 2 in More Genetic TIPS...Ch. 26 - All of the homeotic genes inDrosophilahave been...Ch. 26 - Prob. 9EQCh. 26 - wo techniques commonly used to study the...Ch. 26 - Prob. 11EQCh. 26 - Prob. 12EQCh. 26 - 13. Another way to study the role of proteins...Ch. 26 - 14. Why have geneticists used reverse genetics to...Ch. 26 - Prob. 1QSDCCh. 26 - Prob. 2QSDCCh. 26 - Prob. 3QSDC
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- Explain the role of axis formation in development.arrow_forwardFor genes that control pathways of development, loss-of-function mutations are usually recessive whereas gainof-function mutations are usually dominant. Can you suggest a reason why?arrow_forwardDistinguish between the syncytial blastoderm stage and the cellular blastoderm stage in Drosophila embryogenesis.arrow_forward
- State the function of homeotic genes. Describe how nurse cells in fruit flies can affect larval development independent of the larval genotype.arrow_forwardExplain why axis-determination is a crucial aspect of embryonic development. Explain how maternal-effect genes encode cytoplasmic factors that play a role in axis determination.arrow_forwardWhat piece of a transcript is utilized to localize the mRNA and why is this critical to development? a. 3'UTR; protein gradients have a large influence on gene expression of cells b. 5'UTR; protein gradients have a large influence on gene expression in cells c. the promoter; it has a large influence on protein production within a cell d. The TATA box; it has a large influence on protein production within a cellarrow_forward
- Describe key events in early Drosophila developmentthat occur before segmentation is first apparent.arrow_forwardWhen in fruit fly development does axes development begin? A. in the unfertilized egg stage when maternal effect genes deposit mRNA and proteins in specific locations B. in the early embryo stage when induction signals between neighboring cells identify where the cells are in three-dimensional space C. in the larval stage when body segments appear, and pattern formation is evident D. in the pupal stage when a gradient of morphogens is establishedarrow_forwardAs shown in Figure 13-26, the Sonic hedgehog gene is expressed in many places in a developing chicken. Is theidentical Sonic hedgehog protein expressed in each tissue? If so, how do the tissues develop into different structures? If not, how are different Sonic hedgehog proteinsproduced?arrow_forward
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