Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 20.2, Problem 2CC
Development in Animals I: Pattern Formation
Concept Check: What is the function of the Bicoid protein? After fertilization, in which part of the resulting zygote will its function be highest?
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Chapter 20 Solutions
Biology
Ch. 20.1 - 20.1 General Themes in Development Concept Check:...Ch. 20.1 - Prob. 2CCCh. 20.1 - Prob. 1CSCh. 20.2 - Development in Animals I: Pattern Formation...Ch. 20.2 - Development in Animals I: Pattern Formation...Ch. 20.2 - Prob. 3CCCh. 20.2 - Core Skill: Modeling The goal of this modeling...Ch. 20.2 - Development in Animals I: Pattern Formation Core...Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.3 - Development in Animals II: Cell Differentiation...
Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.3 - Development in Animals II: Cell Differentiation...Ch. 20.4 - Development in Plants Concept Check: Where are...Ch. 20.4 - Prob. 2CCCh. 20 - The process whereby a cells morphology and...Ch. 20 - Prob. 2TYCh. 20 - Positional information is important in determining...Ch. 20 - Morphogens are a. molecules that disrupt normal...Ch. 20 - Prob. 5TYCh. 20 - Arrange the following phases of pattern formation...Ch. 20 - Prob. 7TYCh. 20 - Which of the following genes do not play a role in...Ch. 20 - An embryonic stem cell that can give rise to any...Ch. 20 - Prob. 10TYCh. 20 - Prob. 1CQCh. 20 - The MyoD gene in mammals plays a role in muscle...Ch. 20 - Prob. 3CQCh. 20 - Prob. 1COQCh. 20 - Is it possible for a phenotypically normal female...
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- Discuss Concepts Arguably, in sexually reproducing animals, development begins when eggs and sperm form in the parents. In a paragraph, explain the rationale for this idea.arrow_forwardDiscuss Concepts Developmental biologist Lewis Wolpert once observed that it is not birth, marriage or death, but gastrulation which is truly the most important time in your life. In what sense is he correct?arrow_forwardIDENTIFICATION (Subject - Development Biology) 1. Historical transformation of the forms of life starting from the simple forms of the past to the complex forms of the present? 2. This is formed when small group of cells segregate from another group of cells? 3. Process when one embryonic region interacts with the second and affects the second regions differentiation or behaviour?arrow_forward
- What are morphogens, exactly? Explain how they affect the patterning of tissue throughout embryonic development. Give 4 concrete instances to back up your claims.arrow_forwardDiscuss Concepts Experimentally, it is possible to divide an amphibian egg so that the gray crescent is wholly within one of the two cells formed. If the two cells are separated, only the cell with the gray crescent will form an embryo with a long axis, notochord, nerve cord, and back musculature. The other forms a shapeless mass of immature gut and blood cells. Propose an explanation for these outcomes.arrow_forwardDraw a serial transverse section of 18 hour chick embryo.arrow_forward
- Developmental Biology Questio: List two similarites and two differences between the cells on the top arrow and the cells on the bottom arrow. Please explain and make it neat and detailed.arrow_forwardhttps://nj.pbslearningmedia.org/resource/tdc02.sci.life.stru.different/cell-differentiation/#.XhYcbf5KjBI How would you explain the similarities among bird, mammal, and reptile embryos at the early stages of development, and what directs the sequence of events during embryonic development?arrow_forwardMAKE CONNECTIONS Unlike some other types of birthdefects, neural tube defects are largely preventable.Explain (see Figure 41.4).arrow_forward
- WHAT IF? If the ventral cells of an early frog gastrulawere experimentally induced to express large amountsof a protein that inhibits BMP-4, could a second embryodevelop? Explain.arrow_forwardWhich statements are true? Explain why or why not.1 In the early cleavage stages, when the embryocannot yet feed, the developmental program is driven andcontrolled entirely by the material deposited in the egg bythe mother.2 Because of the many later developmental trans-formations that produce the elaborately structured organs,the body plan set up during gastrulation bears little resem-blance to the body plan in the adult.3 As development progresses, individual cellsbecome more and more restricted in the range of cell typesthey can give rise to.4 At different stages of embryonic development,the same signals are used over and over again by differentcells, but with different biological outcomes.5 Changes in the coding regions of genes involved indevelopment are primarily responsible for the differencesbetween species. 6 The cell cycle is the ticking clock that sets thetempo of developmental processes, with maturationalchanges in gene expression being dependent on cell-cycleprogression.arrow_forwardExplain further each number 1. Compare and contrast the sequence of fertilization events that take place in the sea urchin vs. mammals. 2. How do the sperm and egg recognize each other? What molecules are involved?arrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY