Evolution. Population Genetics. Targets: Alleles and Genes 3/30/2014
|
|
- Lilian Parsons
- 6 years ago
- Views:
Transcription
1 Targets: Alleles and Genes Evolution Population Genetics 1. I can explain how genetic variation in a species increases chances for survival 2. I can write an example of how lethal alleles are stored in a gene pool 3. I can define allele frequency 4. I can explain why natural selection acts on phenotype rather than genotype Vocabulary Review Population all of the individuals of a single species that live together in one place. Natural Selection populations changing in response to their environment as individuals adapt and leave more offspring. Allele alternative forms of a gene that code for the same trait (Ex: eye color has blue, brown, green,.) You have two alleles for each trait, one from your mom and one from your dad. Phenotype the physical traits expressed for each allele Ex: Genotype = BB Phenotype = Brown eyes Genetic variation increases the chance of survival for a species Natural Selection selects for favorable phenotypes of a population The more variety there is within a population, the more likely that population will survive changes. Examples: - during cold winters, penguins that are short and round might survive the cold better. - during famine, tall and slender penguins might be able to dive deeper for additional food sources. Genetic variation is stored in a population's gene pool A gene pool is the combined alleles of all the individuals in a population. The more alleles for a trait, the greater the genetic variation Allele frequency is the relative amount of an allele in a population. 1
2 Allele Frequency How to calculate allele frequency in a population: Count the number of times a specific allele occurs in a gene pool Divide by the total number of alleles Answer expressed as a percentage (%) What is the allele frequency for b? What is the allele frequency for B? 7/14 = 50% How are lethal alleles stored in a gene pool? Most lethal alleles are recessive and do not appear until later in life *Most people don t know they are carriers *Don t know they have it till later in life (have already passed on the gene to kids) *Both parents must carry the recessive gene (only 25% chance of passing on) Targets: Effects of Mutations 5. I can explain how mutations can increase genetic variation. 6. I can evaluate the impact that mutations can have in a gene pool. How is genetic variation created? Two main sources of new variation in a population: Mutations Recombination (during meiosis) Mutations A mutation is a random change in DNA New mutations are constantly being generated, adding new alleles to the gene pool, thus increasing genetic variation in the population Change can be positive, negative or neutral 2
3 Mutations alter genotype DNA is changed add variety to a population Natural Selection acts on phenotype. DNA is NOT changed New variations ARE NOT added Favorable traits (either from mutations or meiosis) are passed on Natural Selection acts on the distribution of traits within a population Within a population there is a range of phenotypes for each trait. These ranges often have more of some phenotypes and less of others. Natural Selection can change the distribution in 3 ways: Stabilizing Directional Diversifying/Disruptive Stabilizing Selection Extremes from both ends of the frequency distribution are eliminated. Most common form of natural selection Example: birth weight of babies Directional Selection Favors phenotypes at one extreme of a trait s range. What we usually think of as natural selection. Example: increase of drug-resistant bacteria Disruptive Selection Both extreme phenotypes are favored at expense of middle phenotype. Favoring both extremes can lead to new species formation. Example: small-medium-large beak size of finch Targets: Gene Flow 7. I can define gene flow 8. I can define and give examples of genetic drift. 3
4 Gene Flow The movement of alleles from one population to another (migration). - can occur in plants and animals - increases variation in receiving population ** a lack of gene flow between 2 populations increases the chance they will evolve into 2 different species. Genetic Drift Change in allele frequency due to chance. - causes a loss of diversity - greatly affects smaller populations Two types of genetic drift: Founder Effect Bottleneck Effect Founder Effect A small group of individuals break away and colonize a new area. - gene pool of small group different from original group. Example: Ellis-van Creveld Syndrome Amish population in Pennsylvania Bottleneck Effect Occurs after an event greatly reduces the size of a population: - overhunting - predation - catastrophe New population no longer has many alleles that old population has. 4
5 Effects of Genetic Drift Loss of genetic variation Lethal alleles become more common Founder Effect Video Types of Isolation Geographic Isolation Barriers divide a population: rivers, mountains, dried lake beds. Reproductive Isolation Members of a population are unable to mate successfully with each other. Could be due to different mating seasons, different mating calls, variations that favor different environmental factors. Last step in becoming different species. 5
16.2 Evolution as Genetic Change
16.2 Evolution as Genetic Change 1 of 40 16-2 Evolution as Genetic Change 16-2 Evolution as Genetic Change If an individual dies without reproducing, it does not contribute to the gene pool. If an individual
More informationThe Theory of Evolution
The Theory of Evolution Mechanisms of Evolution Notes Pt. 4 Population Genetics & Evolution IMPORTANT TO REMEMBER: Populations, not individuals, evolve. Population = a group of individuals of the same
More information5/2/ Genes and Variation. How Common Is Genetic Variation? Variation and Gene Pools
16-1 Genes 16-1 and Variation Genes and Variation 1 of 24 How Common Is Genetic Variation? How Common Is Genetic Variation? Many genes have at least two forms, or alleles. All organisms have genetic variation
More informationEvolution in a Genetic Context
Evolution in a Genetic Context What is evolution? Evolution is the process of change over time. In terms of genetics and evolution, our knowledge of DNA and phenotypic expression allow us to understand
More informationPopulation- group of individuals of the SAME species that live in the same area Species- a group of similar organisms that can breed and produce
Dr. Bertolotti Essential Question: Population- group of individuals of the SAME species that live in the same area Species- a group of similar organisms that can breed and produce FERTILE offspring Allele-
More informationUNIT 4: EVOLUTION Chapter 11: The Evolution of Populations
CORNELL NOTES Directions: You must create a minimum of 5 questions in this column per page (average). Use these to study your notes and prepare for tests and quizzes. Notes will be stamped after each assigned
More informationStudy Guide A. Answer Key. The Evolution of Populations
The Evolution of Populations Answer Key SECTION 1. GENETIC VARIATION WITHIN POPULATIONS 1. b 2. d 3. gene pool 4. combinations of alleles 5. allele frequencies 6. ratio or percentage 7. mutation 8. recombination
More informationHow Populations Evolve. Chapter 15
How Populations Evolve Chapter 15 Populations Evolve Biological evolution does not change individuals It changes a population Traits in a population vary among individuals Evolution is change in frequency
More information11.1 Genetic Variation Within Population. KEY CONCEPT A population shares a common gene pool.
11.1 Genetic Variation Within Population KEY CONCEPT A population shares a common gene pool. 11.1 Genetic Variation Within Population Genetic variation in a population increases the chance that some individuals
More informationSection KEY CONCEPT A population shares a common gene pool.
Section 11.1 KEY CONCEPT A population shares a common gene pool. Genetic variation in a population increases the chance that some individuals will survive. Why it s beneficial: Genetic variation leads
More informationBIOLOGY 3201 UNIT 4 EVOLUTION CH MECHANISMS OF EVOLUTION
BIOLOGY 3201 UNIT 4 EVOLUTION CH. 20 - MECHANISMS OF EVOLUTION POPULATION GENETICS AND HARDY WEINBERG PRINCIPLE Population genetics: this is a study of the genes in a population and how they may or may
More informationEVOLUTION OF POPULATIONS Genes and Variation
Section Outline Section 16-1 EVOLUTION OF POPULATIONS Genes and Variation When Darwin developed his theory of evolution, he didn t know how HEREDITY worked. http://www.answers.com/topic/gregor-mendel Mendel
More informationPopulation genetics. Population genetics provides a foundation for studying evolution How/Why?
Population genetics 1.Definition of microevolution 2.Conditions for Hardy-Weinberg equilibrium 3.Hardy-Weinberg equation where it comes from and what it means 4.The five conditions for equilibrium in more
More informationSummary Genes and Variation Evolution as Genetic Change. Name Class Date
Chapter 16 Summary Evolution of Populations 16 1 Genes and Variation Darwin s original ideas can now be understood in genetic terms. Beginning with variation, we now know that traits are controlled by
More information11.1 Genetic Variation Within Population. KEY CONCEPT A population shares a common gene pool.
11.1 Genetic Variation Within Population KEY CONCEPT A population shares a common gene pool. 11.1 Genetic Variation Within Population! Genetic variation in a population increases the chance that some individuals
More informationIntroduction Chapter 23 - EVOLUTION of
Introduction Chapter 23 - EVOLUTION of POPULATIONS The blue-footed booby has adaptations that make it suited to its environment. These include webbed feet, streamlined shape that minimizes friction when
More informationEvolution of Populations (Ch. 17)
Evolution of Populations (Ch. 17) Doonesbury - Sunday February 8, 2004 Beak depth of Beak depth Where does Variation come from? Mutation Wet year random changes to DNA errors in gamete production Dry year
More informationPopulation Genetics (Learning Objectives)
Population Genetics (Learning Objectives) Recognize the quantitative nature of the study of population genetics and its connection to the study of genetics and its applications. Define the terms population,
More informationPopulation Genetics (Learning Objectives)
Population Genetics (Learning Objectives) Recognize the quantitative nature of the study of population genetics and its connection to the study of genetics and its applications. Define the terms population,
More informationThe Evolution of Populations
The Evolution of Populations Population genetics Population: a localized group of individuals belonging to the same species Species: a group of populations whose individuals have the potential to interbreed
More informationZoology Evolution and Gene Frequencies
Zoology Evolution and Gene Frequencies I. any change in the frequency of alleles (and resulting phenotypes) in a population. A. Individuals show genetic variation, but express the genes they have inherited.
More information-Is change in the allele frequencies of a population over generations -This is evolution on its smallest scale
Remember: -Evolution is a change in species over time -Heritable variations exist within a population -These variations can result in differential reproductive success -Over generations this can result
More informationCH. 22/23 WARM-UP. 1. List 5 different pieces of evidence for evolution.
CH. 22/23 WARM-UP 1. List 5 different pieces of evidence for evolution. 2. (Review) What are the 3 ways that sexual reproduction produces genetic diversity? 3. What is 1 thing you are grateful for today?
More informationPopulation Genetics Modern Synthesis Theory The Hardy-Weinberg Theorem Assumptions of the H-W Theorem
Population Genetics A Population is: a group of same species organisms living in an area An allele is: one of a number of alternative forms of the same gene that may occur at a given site on a chromosome.
More informationLesson Overview. What would happen when genetics answered questions about how heredity works?
17.1 Darwin developed his theory of evolution without knowing how heritable traits passed from one generation to the next or where heritable variation came from. What would happen when genetics answered
More informationCHAPTER 12 MECHANISMS OF EVOLUTION
CHAPTER 12 MECHANISMS OF EVOLUTION 12.1 Genetic Variation DNA biological code for inheritable traits GENES units of DNA molecule in a chromosome LOCI location of specific gene on DNA molecules DIPLOID
More information17.1 What Is It That Evolves? Microevolution. Microevolution. Ch. 17 Microevolution. Genes. Population
Ch. 17 Microevolution 17.1 What Is It That Evolves? Microevolution Population Defined as all the members of a single species living in a defined geographical area at a given time A sexually reproducing
More information11.1. A population shares a common gene pool. The Evolution of Populations CHAPTER 11. Fill in the concept map below.
SECTION 11.1 GENETIC VARIATION WITHIN POPULATIONS Study Guide KEY CONCEPT A population shares a common gene pool. VOCABULARY gene pool allele frequency MAIN IDEA: Genetic variation in a population increases
More informationMECHANISMS FOR EVOLUTION CHAPTER 20
MECHANISMS FOR EVOLUTION CHAPTER 20 Objectives State the Hardy-Weinburg theorem Write the Hardy-Weinburg equation and be able to use it to calculate allele and genotype frequencies List the conditions
More information5/18/2017. Genotypic, phenotypic or allelic frequencies each sum to 1. Changes in allele frequencies determine gene pool composition over generations
Topics How to track evolution allele frequencies Hardy Weinberg principle applications Requirements for genetic equilibrium Types of natural selection Population genetic polymorphism in populations, pp.
More informationThe Evolution of Populations
The Evolution of Populations What you need to know How and reproduction each produce genetic. The conditions for equilibrium. How to use the Hardy-Weinberg equation to calculate allelic and to test whether
More informationChapter 25 Population Genetics
Chapter 25 Population Genetics Population Genetics -- the discipline within evolutionary biology that studies changes in allele frequencies. Population -- a group of individuals from the same species that
More informationEvolution of Populations
Chapter 23. Evolution of Populations 1 Populations evolve Natural selection acts on individuals differential survival survival of the fittest differential reproductive success bear more offspring Populations
More informationGENETICS - CLUTCH CH.21 POPULATION GENETICS.
!! www.clutchprep.com CONCEPT: HARDY-WEINBERG Hardy-Weinberg is a formula used to measure the frequencies of and genotypes in a population Allelic frequencies are the frequency of alleles in a population
More informationChapter 23: The Evolution of Populations. 1. Populations & Gene Pools. Populations & Gene Pools 12/2/ Populations and Gene Pools
Chapter 23: The Evolution of Populations 1. Populations and Gene Pools 2. Hardy-Weinberg Equilibrium 3. A Closer Look at Natural Selection 1. Populations & Gene Pools Chapter Reading pp. 481-484, 488-491
More informationAll the, including all the different alleles, that are present in a
Evolution as Genetic Change: chapter 16 Date name A group of individuals of the same species that interbreed. All the, including all the different alleles, that are present in a Relative Allele frequency
More informationThe Evolution of Populations
Chapter 23 The Evolution of Populations PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from
More informationEdexcel (B) Biology A-level
Edexcel (B) Biology A-level Topic 8: Origins of Genetic Variation Notes Meiosis is reduction division. The main role of meiosis is production of haploid gametes as cells produced by meiosis have half the
More informationAverage % If you want to complete quiz corrections for extra credit you must come after school Starting new topic today. Grab your clickers.
Average 50.83% If you want to complete quiz corrections for extra credit you must come after school Starting new topic today. Grab your clickers. Evolution AP BIO Pacing Evolution Today Mutations Gene
More informationThe Evolution of Populations
Chapter 23 The Evolution of Populations PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from
More informationQuiz will begin at 10:00 am. Please Sign In
Quiz will begin at 10:00 am Please Sign In You have 15 minutes to complete the quiz Put all your belongings away, including phones Put your name and date on the top of the page Circle your answer clearly
More informationPopulation Genetics. Chapter 16
Population Genetics Chapter 16 Populations and Gene Pools Evolution is the change of genetic composition of populations over time. Microevolution is change within species which can occur over dozens of
More informationChapter 23: The Evolution of Populations
AP Biology Reading Guide Name Chapter 23: The Evolution of Populations This chapter begins with the idea that we focused on as we closed the last chapter: Individuals do not evolve! Populations evolve.
More informationGenetic Equilibrium: Human Diversity Student Version
Genetic Equilibrium: Human Diversity Student Version Key Concepts: A population is a group of organisms of the same species that live and breed in the same area. Alleles are alternate forms of genes. In
More informationThe Making of the Fittest: Natural Selection in Humans
POPULATION GENETICS, SELECTION, AND EVOLUTION INTRODUCTION A common misconception is that individuals evolve. While individuals may have favorable and heritable traits that are advantageous for survival
More informationPopulation and Community Dynamics. The Hardy-Weinberg Principle
Population and Community Dynamics The Hardy-Weinberg Principle Key Terms Population: same species, same place, same time Gene: unit of heredity. Controls the expression of a trait. Can be passed to offspring.
More informationThe Evolution of Populations
Microevolution The Evolution of Populations C H A P T E R 2 3 Change in allele frequencies over generations Three mechanisms cause allele frequency change: Natural selection (leads to adaptation) Genetic
More informationAP Biology Laboratory 8 Population Genetics Virtual Student Guide
AP Biology Laboratory 8 Population Genetics Virtual Student Guide http://www.phschool.com/science/biology_place/labbench/index.html Introduction The Hardy-Weinberg law of genetic equilibrium provides a
More informationPopulation Genetics (Learning Objectives)
Population Genetics (Learning Objectives) Define the terms population, species, allelic and genotypic frequencies, gene pool, and fixed allele, genetic drift, bottle-neck effect, founder effect. Explain
More informationHardy-Weinberg problem set
Hardy-Weinberg problem set Hardy-Weinberg Theorem states that if a population is NOT evolving then the frequencies of the alleles in the population will remain stable across generations - it is in equilibrium.
More information4) How many alleles does each individual carry? 5) How many total alleles do we need to create this population?
SC135 Introductory Biology Hardy-Weinberg and Natural Selection with M & M s Lab Objectives: Understand the concepts of allele frequency, genotype frequency and phenotype frequency in a population. Understand
More informationIntroduction. Let s try this again. Do you change during your lifetime? Do you evolve??
Introduction Let s try this again Do you change during your lifetime? Do you evolve?? What questions couldn t Darwin answer? What if he could have called Mendel as a lifeline? Population genetics was born
More informationIntroduction. Let s try this again. Do you change during your lifetime? Do you evolve??
Introduction Let s try this again Do you change during your lifetime? Do you evolve?? What questions couldn t Darwin answer? What if he could have called Mendel as a lifeline? Population genetics was born
More information5 FINGERS OF EVOLUTION
MICROEVOLUTION Student Packet SUMMARY EVOLUTION IS A CHANGE IN THE GENETIC MAKEUP OF A POPULATION OVER TIME Microevolution refers to changes in allele frequencies in a population over time. NATURAL SELECTION
More informationThe Modern Synthesis. Causes of microevolution. The Modern Synthesis. Microevolution. Genetic Drift. Genetic drift example
The Modern Synthesis Populations are the units of evolution Natural selection plays an important role in evolution, but is not the only factor Speciation is at the boundary between microevolution and macroevolution
More informationthebiotutor.com A2 Biology Unit 5 Genetics
thebiotutor.com A2 Biology Unit 5 Genetics 1 Some important terms Using the example of tall (T) and short (t) pea plants, explain the meaning of the following terms: Gene Allele Phenotype Genotype Homozygous
More informationHardy-Weinberg Principle 4/5/09. Chapter 20. Godfrey H. Hardy: English mathematician Wilhelm Weinberg: German physician
Chapter 20 1 Godfrey H. Hardy: English mathematician Wilhelm Weinberg: German physician Concluded that: The original proportions of the genotypes in a population will remain constant from generation to
More informationChapter 8: Evolution Lesson 8.3: Microevolution and the Genetics of Populations
Chapter 8: Evolution Lesson 8.3: Microevolution and the Genetics of Populations Microevolution refers to varieties within a given type. Change happens within a group, but the descendant is clearly of the
More informationLABORATORY 8. POPULATION GENETICS AND EVOLUTION
STUDENT GUIDE LABORATORY 8. POPULATION GENETICS AND EVOLUTION Objectives In this activity, you will learn about the Hardy-Weinberg law of genetic equilibrium study the relationship between evolution and
More informationEvolutionary Mechanisms
Evolutionary Mechanisms Tidbits One misconception is that organisms evolve, in the Darwinian sense, during their lifetimes Natural selection acts on individuals, but only populations evolve Genetic variations
More informationGenetic variation and change the short version
Part 1: Biodiversity and variation Genetic variation and change the short version Define biodiversity and describe its advantages. Why is variation important to a species? What is DNA? A chromosome? A
More informationLABORATORY 8: POPULATION GENETICS AND EVOLUTION
LABORATORY 8: POPULATION GENETICS AND EVOLUTION OVERVIEW In this activity you will learn about the Hardy-Weinberg law of genetic equilibrium and study the relationship between evolution and changes in
More information*No in-class activities can be made up for unexcused absences. See syllabus.
ICA 13 Key *No in-class activities can be made up for unexcused absences. See syllabus. Bluegill Q1. A large population of bluegill (a freshwater fish) was observed over ten consecutive summers. When traits
More informationGENES IN POPULATIONS
ANTHR1L Biological Anthropology Lab NAME: (Portions of this lab have been adapted from Walker, S., Exploring Physical Anthropology: A Lab Manual & Workbook. Westview Press, 2007. INTRODUCTION Evolution,
More informationLAB ACTIVITY ONE POPULATION GENETICS AND EVOLUTION 2017
OVERVIEW In this lab you will: 1. learn about the Hardy-Weinberg law of genetic equilibrium, and 2. study the relationship between evolution and changes in allele frequency by using your class to represent
More informationMendelian genetics recap
Mendelian genetics recap Principle of segregation: traits are controlled by discrete units which come in pairs and separate into sex cells. Principle of independent assortment: traits are inherited separately
More informationEXERCISE 1. Testing Hardy-Weinberg Equilibrium. 1a. Fill in Table 1. Calculate the initial genotype and allele frequencies.
Biology 152/153 Hardy-Weinberg Mating Game EXERCISE 1 Testing Hardy-Weinberg Equilibrium Hypothesis: The Hardy-Weinberg Theorem says that allele frequencies will not change over generations under the following
More informationAP BIOLOGY Population Genetics and Evolution Lab
AP BIOLOGY Population Genetics and Evolution Lab In 1908 G.H. Hardy and W. Weinberg independently suggested a scheme whereby evolution could be viewed as changes in the frequency of alleles in a population
More informationBlock: Science 10 Biology Biology Review Package. 1. What is the full name for DNA? Label the following diagram on the right. Deoxyriboucleic Acid
Review Package 1. What is the full name for DNA? Label the following diagram on the right. Deoxyriboucleic Acid 2. What is the function of DNA? DNA provides the genetic code for organisms. It makes you
More information7-1. Read this exercise before you come to the laboratory. Review the lecture notes from October 15 (Hardy-Weinberg Equilibrium)
7-1 Biology 1001 Lab 7: POPULATION GENETICS PREPARTION Read this exercise before you come to the laboratory. Review the lecture notes from October 15 (Hardy-Weinberg Equilibrium) OBECTIVES At the end of
More informationVirtual Lab 2 Hardy-Weinberg
Name Period Assignment # Virtual Lab 2 Hardy-Weinberg http://www.phschool.com/science/biology_place/labbench/lab8/intro.html Read the introduction Click Next 1) Define allele 2) Define Hardy-Weinberg equilibrium
More informationModule 20: Population Genetics, Student Learning Guide
Name: Period: Date: Module 20: Population Genetics, Student Learning Guide Instructions: 1. Work in pairs (share a computer). 2. Make sure that you log in for the first quiz so that you get credit. 3.
More informationBio 6 Natural Selection Lab
Bio 6 Natural Selection Lab Overview In this laboratory you will demonstrate the process of evolution by natural selection by carrying out a predator/prey simulation. Through this exercise you will observe
More informationMICROEVOLUTION. On the Origin of Species WHAT IS A SPECIES? WHAT IS A POPULATION? Genetic variation: how do new forms arise?
MICROEVOLUTION On the Origin of Species WHAT IS A SPECIES? Individuals in one or more populations Potential to interbreed Produce fertile offspring WHAT IS A POPULATION? Group of interacting individuals
More informationModule 20: Population Genetics, Student Learning Guide
Name: Period: Date: Module 20: Population Genetics, Student Learning Guide Instructions: 1. Work in pairs (share a computer). 2. Make sure that you log in for the first quiz so that you get credit. 3.
More informationMeasuring Evolution of Populations
Measuring Evolution of Populations 5 Agents of evolutionary change Mutation Gene Flow Non-random mating Genetic Drift Selection Populations & gene pools Concepts u a population is a localized group of
More informationLAB 12 Natural Selection INTRODUCTION
LAB 12 Natural Selection Objectives 1. Model evolution by natural selection. 2. Determine allele frequencies within a population. 3. Use the Hardy-Weinberg equation to calculate probability of each genotype
More informationTHE EVOLUTION OF DARWIN S THEORY PT 1. Chapter 16-17
THE EVOLUTION OF DARWIN S THEORY PT 1 Chapter 16-17 From Darwin to Today Darwin provided compelling evidence that species and populations change. What he didn t know (and neither did anyone else at the
More informationBiology Day 82. Announcements& Upcoming& Science&teachers&out&Thurs.&4/16& Collab&schedule&Mon.&4/20& ReCtake&your&test&!& & Planner: Study Guide 11.
Biology Day 82 Monday, April 13 Tuesday, April 14, 2015 Types'of'Selec-on '& 1. Write'today s'flt'' 2. Divide'your'paper'into'3'sec-ons:'(1)' Direc-onal'selec-on'(2)'Stabilizing'and' (3)'Disrup-ve' 3.
More informationlarger voles lose less heat / are better insulated or more energy stored
Page of Mark schemes any five from: genetic variation exists in a population or variation caused by mutation / change in gene / in DNA larger voles have smaller or have more fat they accept as larger voles
More informationi. allelic frequency c. reproductive isolation j. sexual selection d. allopatric speciation k. founder effect e. sympatric speciation
Name Hardy-Weinberg and Evolution The Hardy-Weinberg equation is used to determine whether there is any change in the distribution of given alleles over time. You will work through several examples of
More informationLAB. POPULATION GENETICS. 1. Explain what is meant by a population being in Hardy-Weinberg equilibrium.
Period Date LAB. POPULATION GENETICS PRE-LAB 1. Explain what is meant by a population being in Hardy-Weinberg equilibrium. 2. List and briefly explain the 5 conditions that need to be met to maintain a
More informationAnthro 101: Human Biological Evolution. Lecture 3: Genetics & Inheritance. Prof. Kenneth Feldmeier feldmekj.weebly.
Anthro 101: Human Biological Evolution Lecture 3: Genetics & Inheritance Prof. Kenneth Feldmeier feldmekj@lavc.edu feldmekj.weebly.com What is Genetics??? Spend a few minutes discussing Genetics.. Genetics
More informationGenetic Variation. Genetic Variation within Populations. Population Genetics. Darwin s Observations
Genetic Variation within Populations Population Genetics Darwin s Observations Genetic Variation Underlying phenotypic variation is genetic variation. The potential for genetic variation in individuals
More informationMeasuring Evolution of Populations. SLIDE SHOW MODIFIED FROM KIM
Measuring Evolution of Populations SLIDE SHOW MODIFIED FROM KIM FOGLIA@explorebiology.com 5 Agents of evolutionary change Mutation Gene Flow Non-random mating Genetic Drift Selection Populations & gene
More informationThe Evolution of Populations
Chapter 23 The Evolution of Populations PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from
More informationThe Modern Synthesis. Terms and Concepts. Evolutionary Processes. I. Introduction: Where do we go from here? What do these things have in common?
Evolutionary Processes I. Introduction - The modern synthesis Reading: Chap. 25 II. No evolution: Hardy-Weinberg equilibrium A. Population genetics B. Assumptions of H-W III. Causes of microevolution (forces
More informationThe Evolution of Populations
LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson Chapter 23 The Evolution of Populations
More informationGenetic drift. [Not to be confused with antigenic drift or antigenic shift.]
Genetic drift [Not to be confused with antigenic drift or antigenic shift.] Genetic drift or allelic drift is the change in the frequency of a gene variant (allele) in a population due to random sampling.
More informationDistinguishing Among Sources of Phenotypic Variation in Populations
Population Genetics Distinguishing Among Sources of Phenotypic Variation in Populations Discrete vs. continuous Genotype or environment (nature vs. nurture) Phenotypic variation - Discrete vs. Continuous
More informationThe Hardy-Weinberg Principle. Essential Learning Objectives 1.A.1 (g) and 1.A.1 (h)
The Hardy-Weinberg Principle Essential Learning Objectives 1.A.1 (g) and 1.A.1 (h) Evolution of Populations Individuals do not evolve, but rather, populations evolve Scientists use mathematical models
More informationBean Bunny Evolution Modeling Gene Frequency Change (Evolution) in a Population by Natural Selection
Modeling Gene Frequency Change (Evolution) in a Population by Natural Selection In this activity, you will examine natural selection in a small population of wild rabbits. Evolution, on a genetic level,
More informationEVOLUTION/HERDEDITY UNIT Unit 1 Part 8A Chapter 23 Activity Lab #11 A POPULATION GENETICS AND EVOLUTION
AP BIOLOGY EVOLUTION/HERDEDITY UNIT Unit Part 8A Chapter Activity Lab # A NAME DATE PERIOD POPULATION GENETICS AND EVOLUTION In 908 G. H. Hardy and W. Weinberg independently suggest a scheme whereby evolution
More informationHardy-Weinberg Equilibrium
Hardy-Weinberg Equilibrium Hardy-Weinberg Equilibrium, also referred to as the Hardy-Weinberg principle, is used to compare allele frequencies in a given population over a period of time. A population
More informationPOPULATION GENETICS AND EVOLUTION
AP BIOLOGY EVOLUTION ACTIVITY # NAME DATE HOUR POPULATION GENETICS AND EVOLUTION INTRODUCTION In 908 G. H. Hardy and W. Weinberg independently suggest a scheme whereby evolution could be viewed as changes
More informationHardy Weinberg Equilibrium
Gregor Mendel Hardy Weinberg Equilibrium Lectures 4-11: Mechanisms of Evolution (Microevolution) Hardy Weinberg Principle (Mendelian Inheritance) Genetic Drift Mutation Sex: Recombination and Random Mating
More informationGenetics T H E S T U D Y O F H E R E D I T Y
Genetics T H E S T U D Y O F H E R E D I T Y Basic Vocabulary Genetics: The science of heredity Heredity The passing of physical characteristics (traits) from parents to offspring How does an organism
More informationAnthro 101: Human Biological Evolution. Lecture 3: Genetics & Inheritance. Prof. Kenneth Feldmeier feldmekj.weebly.
Anthro 101: Human Biological Evolution Lecture 3: Genetics & Inheritance Prof. Kenneth Feldmeier feldmekj@lavc.edu feldmekj.weebly.com What is Genetics??? Genetics is the scientific study of heredity.
More informationOuter. Last. Possible gamete combinations for parent 1: RY RY ry ry F (first) O (outer) I (inner) L (last)
Dihybrid Crosses Explained: Mendel s Law of Independent Assortment says that genes for different traits can segregate independently during the formation of gametes. What does that mean? It means that the
More informationPre-AP Biology Evolution Review
Pre-AP Biology Evolution Review Variation in Beak Size in Medium Ground Finch If you wanted to look for a change in phenotype beak size over time in a population of finch (which would be evidence of natural
More information