'Natural selection acts' diaporamas de présentation

Chapter 3

Chapter 3. Postulates of Natural Selection. Two important terms. Fitness Survival and reproduction Adaptation A relative increase in fitness. Natural Selection. What it is and What is NOT. Q1. Evolution deals with changes in genotypes but Natural selection acts on phenotypes. True

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CHAPTER 16 EVOLUTION OF POPULATIONS

CHAPTER 16 EVOLUTION OF POPULATIONS. SECTION 1 GENES AND VARIATION. KEY CONCEPT QUESTIONS. What are the main sources of inheritable variation in a population? How is evolution defined in genetic terms? What determines the number of phenotypes for a given trait?.

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Lecture one: what is life?

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Explaining diversity through evolution : branching and clustering

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Evolution and Ecology

Evolution and Ecology. Chapter 6 Evolution and Ecology. CONCEPT 6.1 Evolution can be viewed as genetic change over time or as a process of descent with modification. CONCEPT 6.2 Natural selection, genetic drift, and gene flow can cause allele frequencies in a population to change over time.

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EVOLUTIONARY PROCESSES AND PATTERNS

EVOLUTIONARY PROCESSES AND PATTERNS. Theories of species creations and diversity prior to evolutionary theory Theory of Special Creation Species are unchanged through time and are independent of one another

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Evolution

Evolution. Learning Goals. 1. Define "Evolution" & "Natural Selection". 2. Describe the 4 steps of Natural Selection, giving an example of each. 3. Explain the importance of "Variation". 4. Does Natural Selection act on an organism phenotype or genotoype? Explain!

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Evolution of Populations

Evolution of Populations. Warm Up- 1/22. How do you think migration affects genetics?. Good Things. Challenge. Basketball Ticket Raffle Behavior Academics This Saturday! Drawing on Friday. Lab Update. Populations evolve. Natural selection acts on individuals differential survival

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Theory of Evolution

Theory of Evolution. Chapter 15. Charles Darwin. Who was he? - English naturalist (studied and collected biological specimens) - sailed around the world on ship HMS Beagle - known for his studies of the Galapagos Islands - came up with idea of how organisms change

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Introduction to Darwinian Evolution

Introduction to Darwinian Evolution. Terminology Evolution Accumulation of inherited changes within populations over time Population Group of individuals of one species that live in the same geographic area at the same time Species

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Chapter 4

Chapter 4. Heredity and Evolution. Chapter Outline. Genetic Principles Discovered by Mendel Mendelian Inheritance in Humans Non-Mendelian Patterns of Inheritance Mitochondrial Inheritance. Chapter Outline. Modern Evolutionary Theory Definition of Evolution

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Introduction to Darwinian Evolution

Introduction to Darwinian Evolution. Terminology Evolution Accumulation of inherited changes within populations over time Population Group of individuals of one species that live in the same geographic area at the same time Species

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Introduction to Darwinian Evolution

Introduction to Darwinian Evolution. Terminology Evolution Accumulation of inherited changes within populations over time Population Group of individuals of one species that live in the same geographic area at the same time Species

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Section 2: Genetic Change

Section 2: Genetic Change. Preview Bellringer Key Ideas Equilibrium and Change Sexual Reproduction and Evolution Population Size and Evolution Natural Selection and Evolution Patterns of Natural Selection Summary. Bellringer.

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Evolution: Natural Selection and Phenotypes

Evolution: Natural Selection and Phenotypes. Big Idea 1: Process of evolution drives the diversity of life. Essential Knowledge. 1A1: Natural selection is a major mechanism of evolution. 1A2: Natural selection acts on phenotypic variations.

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Topic 3

Topic 3. Patterns of Selection and Speciation. Stabilizing Selection. Natural selection acts against the extreme phenotypes in a population and favors the middle ground. Example: birth weight in humans. Directional selection.

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The nature of natural selection – 10

The nature of natural selection – 10. “New” traits can evolve although natural selection acts on existing traits the Panda’s “thumb” feathers bird wings Long term directional selection can produce phenotypes that are far outside the phenotypic range of an ancestral population

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Evolution

Evolution. By: Dayne Michael, Ari Argoud , Torrey Donovan, Sara Atun , and Miranda Katz. Vocab Review. Scientific Theory: an explanation of natural phenomenon supported by a large body of scientific evidence obtained from many different investigations and observations

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KEY CONCEPT Darwin proposed natural selection as a mechanism for evolution.

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