Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Textbook Question
Chapter 17, Problem 3TYU
The 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 genes
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Chapter 17 Solutions
Biology (MindTap Course List)
Ch. 17.1 - Prob. 1LOCh. 17.1 - Describe the classic experiments of Steward,...Ch. 17.1 - Define stem cells, distinguish between embryonic...Ch. 17.1 - What lines of evidence support the principle of...Ch. 17.1 - Prob. 2CCh. 17.1 - What does the ability to produce iPSCs tell...Ch. 17.2 - Prob. 4LOCh. 17.2 - Prob. 5LOCh. 17.2 - Prob. 6LOCh. 17.2 - Prob. 7LO
Ch. 17.2 - Prob. 1CCh. 17.2 - Prob. 2CCh. 17.2 - Prob. 3CCh. 17.2 - Prob. 4CCh. 17.3 - Prob. 8LOCh. 17.3 - Prob. 1CCh. 17.3 - Prob. 2CCh. 17 - Prob. 1TYUCh. 17 - Prob. 2TYUCh. 17 - The anteriorposterior axis of a Drosophila embryo...Ch. 17 - Prob. 4TYUCh. 17 - Homeobox genes (a) are found in fruit flies but no...Ch. 17 - Prob. 6TYUCh. 17 - Prob. 7TYUCh. 17 - Which of the following statements about cancer is...Ch. 17 - Proto-oncogenes code for (a) morphogens (b)...Ch. 17 - Prob. 10TYUCh. 17 - Prob. 11TYUCh. 17 - Prob. 12TYUCh. 17 - CONNECT Why is an understanding of gene regulation...Ch. 17 - What is the reason that scientists study...Ch. 17 - Prob. 15TYUCh. 17 - Prob. 16TYUCh. 17 - EVOLUTION LINK What is the common ground between...Ch. 17 - INTERPRET DATA Flower parts are arranged in four...
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- You discover a new Drosophila mutant in which mouthparts are located where the antennae are normally found. You predict that the mutated gene is most likely a (a) homeotic gene (b) gap gene (c) pair–rule gene (d) maternal effect gene (e) segment polarity genearrow_forwardDiscuss how the anterior portion of the anteroposterior axis is established in Drosophila. What aspects of oogenesis are critical in establishing this axis? What do you think would happen if the bicoid mRNA was not trapped at the anterior end but instead diffused freely throughout the oocyte?arrow_forwardHomeotic genes(A) encode transcription factors that control the expression ofgenes responsible for specific anatomical structures.(B) are found only in Drosophila and other arthropods.(C) are the only genes that contain the homeobox domain.(D) encode proteins that form anatomical structures in the fly.arrow_forward
- The easily observed external structures in insects, such as different pairs of legs, antennae, and wings form from imaginal discs. a.) How is the identity of the different Drosophila imaginal discs established in the embryo—for example, how is it determined whether a disc will form a wing, a leg, or some other structure? b.) Dominant mutants in the gene Antennapedia result in fore legs forming in the location where antennae are expected. How does this mutant phenotype illustrate your response to Part a?arrow_forwardWhat would be the most likely effect on development of puncturing the posterior end of a Drosophila egg, allowing a small amount of cytoplasm to leak out, and then injecting that cytoplasm into the anterior end of another egg?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_forward
- Which of the following statement(s) is/are true with regard to positional information in Drosophila? A. Morphogens are a type of molecule that conveys positional information. B. Morphogenetic gradients are established only in the oocyte, prior to fertilization. C. Cell adhesion molecules also provide a way for a cell to obtain positional information.arrow_forwardIn drosophila, a recessive mutation (m-) of a maternal effect gene results in an abnormal phenotype wherein homozygous (m-m-) females produce eggs that cannot support embryonic development. Homozygous (m-m-) males, however, can still produce viable sperm. (A) Using m+ to denote a normal gene, determine the genotypes and phenotypes of the F1s produce by a cross between a heterozygous female and a recessive male. (B) From the offspring, backcross the recessive female with the paternal strain. What are the genotypes and phenotypes of the F2s? (C) If m-m- females produce useless eggs, then how are m-m- produced?arrow_forwardIt seems that developmental genetics boils down to a complex network of gene regulation. Try to draw a structure of this network for Drosophila. How many genes do you think are necessary to complete the developmental network for the fruit fly? How many genes do you think are needed for a network to specify one segment? Do you think it is more difficult to identify genes that are involved in the beginning, middle, or end of this network? Suppose you were trying to identify all of the genes needed for development in a chicken. Knowing what you know about Drosophila development, would you first try to identify genes necessary for early development, or would you begin by identifying genes involved in cell differentiation?arrow_forward
- You engineer a chromosomally XY mouse in which SRY gene is inactivated. What do you expect to observe in this mouse? a) the mouse will develop male anatomical feautures b) the mouse will develop female anatomical feautures c)the mouse Y chromosome will convert into an X chromosome d) the mouse X chromosome will convert into a Y chromosome e) the mouse will exhibit an additional X chromosome making it XXYarrow_forwardRunt is a Drosophila gene involved in development. Mutation of runt leads to an embryonic lethal phenotype in which every other segment in the body plan is missing. What class of developmental genes does runt belong to? O a) Pair-rule genes O b) Segment polarity genes Oc) Homeotic genes O d) Gap genesarrow_forwardDescribe the formation steps of the primary axis that first occurs during development in Drosophila by explaining each molecule.arrow_forward
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