Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 10, Problem 14SQ
Which of the following statements is incorrect?
- a. Some gene expression patterns can be passed to an individual's offspring.
- b. Expression of a master regulator triggers a gene express.ion cascade.
- c. X chromosome inactivation is necessary for normal development of male mammals.
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Which of the following correctly explains how gene expression can change in a differentiating cell in an animal embryo?A. DNA methylation triggered by apoptosis leads to suppression of some genes and expression of others.B. Presence of germ layers trigger hormonal release from endocrine glands, signaling to certain cells to express genes.C. Cell signals through plasmodesmata allow coordination of cellular activities and cell differentiation.D. Cues from the cytoplasm and from surrounding cells can induce changes in gene expression.
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.
Signal transduction pathways are important mechanisms for cell-to-cell communication in multicellular organisms. How do the target cells typically respond when they receive signals from neighboring cells during very early stages of embryo development?
A. The target cells move to one of the poles to establish the anterior-posterior body axis.
B. The target cells undergo changes in gene expression, sending them down a specific developmental path.
C. The target cells stop dividing so the neighboring cells have time to get to the same stage of development.
D. The target cells activate a collection of miRNAs to accelerate transcription and cell division.
Chapter 10 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Gene expression does not vary by ___ . a. cell...Ch. 10 - Binding or ___ to ___ in DNA can increase the rate...Ch. 10 - Muscle cells differ from bone cells because they...Ch. 10 - Prob. 4SQCh. 10 - Mechanisms that govern gene expression do not...Ch. 10 - Prob. 6SQCh. 10 - Prob. 7SQ
Ch. 10 - Prob. 8SQCh. 10 - Which of the following includes all of the others?...Ch. 10 - Prob. 10SQCh. 10 - Prob. 11SQCh. 10 - A cell with a Barr body is ___ . a. a bacterium b....Ch. 10 - Prob. 13SQCh. 10 - Which of the following statements is incorrect? a....Ch. 10 - Prob. 15SQCh. 10 - Explain why somebut not allof an organism's genes...Ch. 10 - Do the same mechanisms that govern gene expression...Ch. 10 - Prob. 3CTCh. 10 - The photos below show flowers from two Arabidopsis...
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- A key event that initially determines female or male development in Drosophila is the a. transcription of the Sxl gene. b. alternative splicing of the Sxl pre-mRNA. c. expression of the ix gene. d. expression of the her gene.arrow_forwardIn early mammalian development, compaction would likely be blocked by inhibiting expression of which of the following? a. Beta-catenin. b. E-cadherin. c. Bcl2. d. Cdx2.arrow_forwardWhen comparing gene expression of the cells of the ICM and those of the trophoblast, which of the following is TRUE? a. Cells of the trophoblast express Nanog. b. Cells of the ICM and trophoblast will show the same gene expression pattern. c. ICM cells express Cdx2. d. Cells of the ICM express Oct 4arrow_forward
- Which of the following best describes the concept of cell differentiation during the development of a multicellular organism? A. During development, all of the genes in the embryo's cells are expressed at first, but fewer and fewer are expressed as time proceeds. B. During development, different sets of genes are deleted from different cell types so that at the end of development, each cell has only the genes it needs. C. During development, different cells become specialized to have different phenotypes even though they all originated from the same cell. ..arrow_forwardWhich of the following statements about the differential expression of human genes is correct? A. Differential expression does not occur during embryogenesis (development of the embryo). B. The unused genes in differentiated cells no longer retain the potential to be expressed. C. Gene expression patterns of all cells are identical. D. Every cell nucleus contains the complete genome established in the fertilized egg.arrow_forwardIn an embryo from a homozygous Bicoid mutant female,which class(es) of gene expression is (are) abnormal?a. Gap genesb. Pair-rule genesc. Segment-polarity genesd. Hox genesarrow_forward
- In mice, the copy of the Igf2 gene that is inherited from the mother isnever expressed in her offspring. This happens because the Igf2 genefrom the mothera. always undergoes a mutation that inactivates its function.b. is deleted during oogenesis.c. is deleted during embryonic development.d. is not transcribed in the somatic cells of the offspring.arrow_forwardYou are interested in the expression of regions of the X chromosome at different times in human fetal development. You hypothesize that large regions of the X chromosomes will be expressed at times when parts of the reproductive organs are developing. What structural and chemical characteristics of the X chromosome might you look at over time to determine when expression of genes on the X chromosome is enhanced or repressed?arrow_forwardAn organism has a relatively large number of Hox genes in its genome. Which of the following is true of this organism? Select one: А. Its Hox genes cooperate to bring about sexual maturity at the proper stage of development. В. Most of its Hox genes owe their existence to gene fusion events. С. The organism must have multiple paired appendages along the length of its body. D. These genes are fundamental, and are expressed in all cells of the organism. E. The organism has the genetic potential to have a relatively complex anatomy.arrow_forward
- The expression of maternal-effect genes directly leads to a. the establishment of body axes. b. segmentation. c. determination. d. cell differentiation.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_forwardA cytoplasmic determinant can control development at the early stages of development because....? Group of answer choices a. it is a universal activator of all genes b. it is present evenly throughout the cytoplasm c. it is activated by cell division d. it is controlled by genes present in the cytoplasm e. it is laid down in the egg cell by the motherarrow_forward
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