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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Chapter 17, Problem 5TYU
Homeobox genes (a) are found in fruit flies but no other animals (b) tend to be expressed in the order that they appear on a chromosome (c) contain a characteristic DNA sequence (d) b and c (e) a, b, and c
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Homeotic 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.
The cloning experiments carried out on frogs demonstrated that (a) all differentiated frog cells are totipotent (b) some differentiated frog cells are totipotent (c) all nuclei from differentiated frog cells are totipotent (d) some nuclei from differentiated frog cells are totipotent (e) cell differentiation always requires the loss of certain genes
Absence of bicoid mRNA from a Drosophila egg leads to theabsence of anterior larval body parts and mirror-imageduplication of posterior parts. This is evidence that the productof the bicoid gene(A) normally leads to formation of head structures.(B) normally leads to formation of tail structures.(C) is transcribed in the early embryo.(D) is a protein present in all head structures.
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 hope to study a gene that codes for a neurotransmitter protein produced in human brain cells. You know the amino acid sequence of the protein. Explain how you might (a) identify what genes are expressed in a specific type of brain cell, (b) identify (and isolate) the neurotransmitter gene, (c) produce multiple copies of the gene for study, and (d) produce large quantities of the neurotransmitter for evaluation as a potential medication.arrow_forwardWhat are some of the ethical issues that arise from using embryonic stem cells?(b) To avoid these issues, scientists use IPSCs. What are the pros and cons to using iPSCs inrelation to embryonic stem cells?arrow_forwardMost segmentation genes code for (a) transfer RNAs (b) enzymes (c) transcription factors (d) histones (e) transport proteinsarrow_forward
- 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 genesarrow_forwardOther than obvious changes in protein-encoding Neanderthal genes, changes in what type of non-coding DNA sequences would affect cell function? A) Alu family of repeated sequences B) Short tandem repeats (STRs) C) Protein factors that regulate gene expression D) Short interspersed nuclear elements (SINEs)arrow_forwardHomeotic (Hox genes in vertebrates) code for expression of that regulate the OD) Transcription factors, genes that determine segment identity and structure OC) Poly-A tails, that code for proteins that control muscle differentiation OE) Transcription factors, genes that control muscle differentiation OA) Operators, inducible genes coding for enzymes in metabolic pathwaysarrow_forward
- Which of the following illustrates the regulative nature of early mouse development? (a) the mouse embryo is freeliving prior to implantation in the uterus (b) it is possible to produce a transgenic mouse (c) it is possible to produce a mouse in which a specific gene has been knocked out(d) genes related to Drosophila homeotic genes have been identified in mice (e) a chimeric mouse can be produced by fusing two mouse embryosarrow_forwardAn embryologist measures the concentrations of three morphogens (A, B, C) in a row of cells across an embryo, from anterior to posterior. The morphogens cause the expression of various colored pigments as indicated in the graphs. Anterior Posterior Expression of Blue protein only [A] Expression of Red protein only Expression of Green protein only Anterior Posterior [B] Repression of Purple protein Activation of Red protein Anterior Posterior [C] Activation of Yellow protein Which shows the correct expression of pigments expressed in response to Morphogen A? Anterior Posterior Anterior Posterior Anterior Posterior Anterior Posteriorarrow_forwardThe molecular tether that links sister chromatids of a duplicated chromosome to each other is (a) condensin (b) actin (c) myosin (d) cohesin (e) actomyosinarrow_forward
- 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_forwardWhich of the following are possible reasons that a cell would regulate its expression of a gene? (Select all that apply.) (a) an increased need for a particular enzyme (b) a decreased need for a particular enzyme (c) increasing temperature in the external environment (d) changing needs as an organism ages (e) deatharrow_forwardWhich 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.arrow_forward
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