Textbook Question
In adult animals, ___________ are a source of undifferentiated cells that can divide to produce cells that can specialize.
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Ch. 21 - Genes, Development, and Evolution
Freeman7th EditionBiological ScienceISBN: 9783584863285
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Table of contents
- Ch. 1 - Biology: The Study of Life11
- Ch. 2 - Water and Carbon: The Chemical Basis of Life10
- Ch.3 - Protein Structure and Function11
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells10
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation16
- Ch. 10 - Photosynthesis14
- Ch. 11 - Cell-Cell Interactions14
- Ch. 12 - The Cell Cycle12
- Ch. 13 - Meiosis13
- Ch. 14 - Mendel and the Gene32
- Ch. 15 - DNA and the Gene: Synthesis and Repair8
- Ch. 16 - How Genes Work35
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria19
- Ch. 19 - Control of Gene Expression in Eukaryotes17
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers23
- Ch. 21 - Genes, Development, and Evolution13
- Ch. 22 - Evolution by Natural Selection17
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea17
- Ch. 27 - Diversification of Eukaryotes19
- Ch. 28 - Green Algae and Land Plants18
- Ch. 29 - Fungi19
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals20
- Ch. 32 - Deuterostome Animals19
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function16
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development18
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology16
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology16
- Ch. 54 - Biodiversity and Conservation Ecology16
Chapter 21, Problem 4
A tool-kit gene is .
Verified step by step guidance1
Identify the context or the field of study related to the term 'tool-kit gene'. In biology, this term is often used in developmental biology and genetics.
Understand that 'tool-kit genes' refer to a set of genes that are conserved across different species and are fundamental in the development and functioning of organisms.
Recognize that these genes are responsible for key processes in the development of an organism, such as the formation of limbs, organs, and other structures.
Explore examples of tool-kit genes, such as the Hox genes, which play a crucial role in determining the body plan and the formation of various segments in animals.
Consider the importance of tool-kit genes in evolutionary biology, as their conservation and function can provide insights into the evolutionary relationships between different organisms and how complex body structures have evolved.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Tool-kit Genes
Tool-kit genes are a set of genes that play crucial roles in the development and organization of multicellular organisms. They are involved in fundamental processes such as cell differentiation, pattern formation, and the establishment of body plans. These genes often encode transcription factors and signaling molecules that regulate the expression of other genes, thereby influencing the overall developmental pathways.
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Genes & Alleles
Developmental Biology
Developmental biology is the study of the processes by which organisms grow and develop from a single cell into complex structures. It encompasses various stages of development, including embryogenesis, morphogenesis, and organogenesis. Understanding developmental biology is essential for comprehending how tool-kit genes orchestrate the formation of tissues and organs during the life cycle of an organism.
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Evolutionary Developmental Biology (Evo-Devo)
Evolutionary developmental biology, or Evo-Devo, examines the relationship between the development of an organism and its evolutionary history. It explores how changes in tool-kit genes can lead to variations in morphology and function across different species. This field provides insights into how developmental processes have evolved and how they contribute to the diversity of life forms observed in nature.
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Related Practice
Textbook Question
What is a homeotic mutant?a. an individual with a structure located in the wrong placeb. an individual with an abnormal head-to-tail axisc. an individual that is missing segmentsd. an individual with double the normal number of structures
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Textbook Question
A tool-kit gene is .
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Textbook Question
A friend is interested in isolating genes that are expressed solely in liver cells but only has access to skin cells. She asks you for advice on whether to start her studies. What will you say?
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Textbook Question
The following predictions ask you to consider how genetic regulatory cascades provide positional information. Select True or False for each statement.
T/F Mutation of a gene at one level of a regulatory cascade will affect the expression of genes at all levels of the cascade.
T/F Mutation of a gene that is expressed later in a regulatory cascade will affect a smaller region of the body than mutation of gene that is expressed early in the cascade.
T/F In the regulatory cascade used by Drosophila, a gene at one level of the cascade will be controlled only by genes at the level immediately above it.
T/F Genes that control the largest regions of the Drosophila embryo are not transcribed in the embryo.
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Textbook Question
What is the connection between genetic regulatory cascades and the observation that differentiation is a step-by-step process?
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