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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- a) 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_forwardIf the HoxA3 and HoxD3 genesare equivalent, how do you suppose they can play suchdistinct roles in development?arrow_forward
- Which Position-effect variegation in Drosophila?arrow_forwardHow 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_forward
- What experimental evidence demonstrates that molecular gradients in the egg control development?arrow_forwardIn Drosophila sex determination (Check all that apply.) A) XY individuals transcribe the Sxl gene early but not late. B XX individuals carry the Sxl gene, XY individuals do not. XX individuals transcribe the Sxl gene, XY individuals do not. XX individuals express the Sxl protein, XY individuals do not. E) The Sxl transcript (Pre-MRNA) is spliced differently in XX compared to XY individuals.arrow_forwardExplain the functional roles of maternal-effect genes, gap genes, pair-rule genes, and segment-polarity genes in Drosophila development.arrow_forward
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