Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 16.1, Problem 3CC
How do fruit fly maternal effect genes determine the polarity of the egg and the embryo?
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Chapter 16 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 16.1 - Prob. 1CCCh. 16.1 - MAKE CONNECTIONS Explain how the signaling...Ch. 16.1 - How do fruit fly maternal effect genes determine...Ch. 16.2 - Deitys egg donor and surrogate mother were...Ch. 16.2 - WHAT IF? If you were a doctor who wanted to use...Ch. 16.3 - Prob. 1CCCh. 16.3 - Prob. 2CCCh. 16.3 - Prob. 3CCCh. 16 - Muscle cells differ from nerve cells mainly...Ch. 16 - Cell differentiation always involves A. the...
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- Explain mRNA and protein products of maternal effect genes within the early embryo?arrow_forwarda) Do the loss of function phenotypes differ between the genes between the genes in figure 1? What does this mean? b) What are the two cell types responsible for producing maternal gene products involved in terminal patterning in the Drosophila cocyte? In which of these two cell types is each of the three genes expressed? c) Based on the phenotypes you observed for the three genes, and on the differences in their expression patterns, which one of the genes do you think is the localised determinant of terminal patterning? d❘ From the gain-of-function experiments, do trunk and torso like work upstream or downstream of torso? Explain. (4 m e) How might you test which of the trunk and torso-like genes acts upstream of the other? f) The torso gene has been shown to have another important role in Drosophila development outside of terminal patterning. What do you think would be a good first experiment to do to begin to investigate possible other roles for the trunk or torso - like genes? C a…arrow_forwardDistinguish between the syncytial blastoderm stage and the cellular blastoderm stage in Drosophila embryogenesis.arrow_forward
- If the HoxA3 and HoxD3 genesare equivalent, how do you suppose they can play suchdistinct roles in development?arrow_forwardName three possible factors contributing to early asymmetries in a developing embryo (i.e. what are the kinds of things early on that lead to the development of the body axes - dn, a/p, l/r, etc)? In the fruit fly drosophila melanogaster, the anterior-to-posterior body axis becomes segmented into distinct regions. explain the role of the genes bicoid and nanos in this process.arrow_forwardWhich Position-effect variegation in Drosophila?arrow_forward
- How does distribution of the gray crescent affectthe developmental potential of the first two daughter cells?arrow_forwardThe anterior–posterior axis of a Drosophila embryo is first established by certain (a) homeotic genes (b) maternal effect genes (c) segmentation genes (d) proto-oncogenes (e) pair–rule genesarrow_forwardOutline the molecular mechanism of sex determination in Drosophila and mammals.arrow_forward
- 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?arrow_forwardIf a mother snail is heterozygous, Dd, which gene products will the oocyte receive?arrow_forwardWhat experimental evidence demonstrates that molecular gradients in the egg control development?arrow_forward
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