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Thinking about Turtles & Evolution Part 1: How the Turtle Gets its Shell 1
Strange Anatomy 2
Unique Development Expanding edge of the carapacial ridge. A. Entire embryo in cross-section. B. Enlargement. 3
Formation of Bone in Turtle Shell 4 Advantages of Metamerism (repeating body segments) Endochondral Intramembranous
Microeveolution by Speciation (Darwin) Macroevolution = Whole New Body Plans (like turtles) Revision of Text Analogy Problems with transitional forms in nature 5 Microevolution vs Macroevolution
Uniramous & Biramous Appendages Mutation and Specilization 6
Gene Regulation: On/Off Switches 7
Real world example of Gene Regulation in Prokaryote (E. coli) 8 Generalize to molecules from adjacent cells serving as signals
Unique Development Expanding edge of the carapacial ridge. A. Entire embryo in cross-section. B. Enlargement. 9
Fruit Fly Drosophila melanogaster Larva (maggot) Adult 10
Embryonic Limb Buds Normal Mutated 11
Chapter 8 The images on this CD have been lifted directly, without change or modification, from textbooks and image libraries owned by the publisher, especially.
Homeobox Genes Body organisation. Cell Differentiation Cell differentiation is the development of non-specialised cells into cells with specialised functions.
CONCEPT 18.4: A PROGRAM OF DIFFERENTIAL GENE EXPRESSION LEADS TO THE DIFFERENT CELL TYPES IN A MULTICELLULAR ORGANISM.
Embryonic Development & Cell Differentiation. During embryonic development, a fertilized egg gives rise to many different cell types Cell types are organized.
Homeobox genes and Apoptosis. Apoptosis Progammed cell death Normal cells can only divide certain number of times Balance between cell death and mitosis.
Chapters 47 & 21 Animal Development & The Genetic Basis of Development.
Genes and Body plans How does an organism become a zygote? How do the different parts of an organism know which way is “up”?
Chapter 21 Reading Quiz 1. When cells become specialized in structure & function, it is called … 2. Name 2 of the 5 “model organisms”. 3. What does it.
Animal Development Chapter 44. Animal Development 2Outline Early Developmental Stages Fertilization Embryonic Development Effect of Yolk Neurulation.
10.4 Evidence of Evolution 1 Evolutionary Time Scales Long time scale events that create and destroy species. Macroevolution: Long time scale events that.
Robustness in biology Eörs Szathmáry Eötvös University Collegium Budapest.
Embryonic Development Timing and coordination of gene activation.
Chapter 21 The Genetic Basis of Development. Introduction The development of a multicellular organism from a single cell is one of the most fascinating.
6/2/11 – “E” Day Objective: To understand how gene technologies are used and discuss their ethical implications. Do Now: -Who are the soldier’s parents?
Consider the following… Do all of the cells in your body carry out the same processes? Do all of the cells in your body make the same proteins? Do.
EVOLUTION Relationships Among Organisms. Similarities Among Organisms All organisms on Earth are related Some relationships are easier to see than others.
PRINCIPLES OF EMBRYONIC DEVELOPMENT © 2012 Pearson Education, Inc.
12-4 MUTATIONS. Mutations – changes in the DNA sequence that affect genetic information Gene mutations result from changes in a single gene. Chromosomal.
Chapter 21: The Genetic Basis of Development From single cell to multicellular organisms: –Embryonic development involves cell division, morphogenesis,
Complexities of Gene Expression Cells have regulated, complex systems –Not all genes are expressed in every cell –Many genes are not expressed all of.
CHAPTER 21 THE GENETIC BASIS OF DEVELOPMENT Section A: From Single Cell to Multicellular Organism 1.Embryonic development involves cell division, cell.
Evolution Charles Darwin Natural Selection: “Survival of fit” Fit reproduce Competition for resources Best adapted species survive.
12.5 Gene Regulation. 1. Gene Regulation In any organism, only a few genes are expressed at each time Operon: group of genes that operate together Scientists.
Patterns in Development Pattern formation must be established via induction prior to morphogenesis. The pattern formation is related to the body plan (its.
Chapter 11 Objectives Explain why cells regulate gene expression. Discuss the role of operons in prokaryotic gene expression. Determine how repressor proteins.
Unit 3A Human Diversity & Change Variation & evolution Evolution.
Chapters 19 - Genetic Analysis of Development: Development Development refers to interaction of then genome with the cytoplasm and external environment.
How Does A Cell Know? Which Gene To Express Which Gene To Express& Which Gene Should Stay Silent? Which Gene Should Stay Silent?
Gene Regulation. Regulation in Prokaryotes Gene Expression = gene to protein processing that functions within cells. Regulation = We are talking about.
Genes and Variation What if so many changes, population can no longer breed with the original population? New species Speciation DNA mutation Beneficial.
Many biological processes involved in growth, reproduction and dynamic homeostasis include temporal regulation and coordination. 2E.
Gene Expression Supplementary reading: Chapter 19 in Campbell 7 th edition.
© 2014 Pearson Education, Inc. TSWBAT recognize the basic steps on the embryonic development of organisms and the role that gene expression plays in that.
Genetics of Axis Specification in Drosophila Part 1 - Basics of Drosophila Embryogenesis Gilbert - Chapter 9.
Flies are quick!. The fly body plan: each segment has a unique identity and produces distinctive structures 3 head 3 thorax 8 abdomen.
Evolution. Evolution Change over time Theory that modern organisms descended from ancient organisms due to how they have changed over a long period of.
Evolution : Supporting Evidence. The following items demonstrate descent with modification, as well as common ancestry. (Darwin’s principle of common.
Gene Expression Chapter 11 Table of Contents Section 1 Control of Gene Expression Section 2 Gene Expression in Development and Cell Division.
Structure, function and growth of prokaryote and eukaryote cells (iii) Differentiation of cells into tissues and organs. (iv) Cell and tissue culture –
Gene Regulation Section 12–5 This section explains how some genes in prokaryotes and eukaryotes are controlled.
10.4 Evidence of Evolution KEY CONCEPT Evidence of common ancestry among species comes from many sources.
Sex-Linkage (X-Linked Traits) Drosophila melanogaster.
Gene Expression and Development II. Final Exam Sunday, May 27, 8:30-11:30 a.m. Here – SMC A110 Please do course evaluations!
AP Biology Development. AP Biology Big Questions: 1. How does a multicellular organism develop from a zygote? 2. How is the position of the parts of an.
Chapters 19 - Genetic Analysis of Development: Development Development refers to interaction of the genome with the cytoplasm and external environment.
STEM CELL RESEARCH. Overview In this activity, you will learn how cell specialization takes place in vertebrate embryos. –Explore a gallery of different.
Who is smarter and does more tricks you or a bacteria? YouBacteria How does my DNA compare to a prokaryote? Show-off.
Section 5.4: Asexual Reproduction Biology. Types of Reproduction Sexual Reproduction Joining of gametes (sperm and eggs), one from each parent Genetically.
Evo-Devo: Development in an Evolutionary Context Control of eyespot development on a developing butterfly wing En/Inv expression Dll expression.
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