AP Chapter 23.2. Mutation  Variation  Natural Selection  Speciation Organisms better suited to the environment SURVIVE & REPRODUCE at a greater rate.

Slides:

Advertisements

Similar presentations

KEY CONCEPT A population shares a common gene pool.

Advertisements

The Five Factors of Evolution

Chapter 23: The Evolution of Populations

Microevolution Chapter 18 contined. Microevolution  Generation to generation  Changes in allele frequencies within a population  Causes: Nonrandom.

11.1 Genetic Variation Within Population KEY CONCEPT A population shares a common gene pool.

Chapter 17: Evolution of Populations

Evolution of Populations

Gene flow is the movement of alleles between populations.

Process of Evolution Chapter 18 Mader: Biology 8th Ed.

Population GENETICS.

Evolution: Lamarck Evolution: Change over time Evolution: Change over time Lamarck Lamarck Use / disuse Use / disuse Theory of inheritance of ACQUIRED.

Evolution as Genetic Change and Speciation. A Population’s Gene Pool A gene pool is all the alleles available in all of the individuals in a population.

Microevolution  Look at processes by which inherited traits change over time  Changes in numbers & types of alleles  Measured in terms of frequency.

Chapter 16 Evolution of Populations. What Darwin Did Not Know He did not know how traits were passed on from one generation to the next. He did not know.

Chapter 16 Evolution of Populations. Variation and Gene Pools Genetic variations (differences) are studied in populations (group of individuals of the.

CHAPTER 23.1 Population Genetics. Quick Review: Natural Selection Variation  Natural Selection  Speciation Organisms better suited to the environment.

Evolution Evolution – change in inherited characteristics/traits in a population over several generations All organisms descend from a common ancestor.

The Evolution of Populations Chapter 21. Microevolution Evolutionary changes within a population  Changes in allele frequencies in a population over.

Mechanisms of Evolution & their Effects on Populations.

EVOLUTION & SPECIATION. Microevolution. What is it? changes in the gene pool of a population over time which result in relatively small changes to the.

MICROEVOLUTION. POPULATION GENETICS PHET NATURAL SELECTION Mutation  Variation  Natural Selection  Speciation.

Evolution Chapter 16 regents. Copyright Pearson Prentice Hall How Common Is Genetic Variation? Many genes have at least two forms, or alleles. All organisms.

Biology 3201 Chapters The Essentials. Micro vs. Macro Evolution Micro Evolution Evolution on a smaller scale. This is evolution within a particular.

Chapter 16: The Evolution of Populations and Speciation Objectives: Describe two causes of genotypic variation in a population Explain how to compute allele.

By: Vanessa Herman Evolution Jeopardy Types of Natural Selection Sources of Variation Changes in Allele Frequencies Random

Microevolution. Levels of Evolutionary Study Microevolution: examines changes to the genes (alleles) within populations –Population Genetics: studies.

Evolution of Populations Chapter 16. The study of genetics helps scientists understand the relationship between inheritance and evolution Scientists know.

Chapter 20 Mechanisms for Evolution Biology 3201.

1 1 Population Genetics _aIocyHc Bozeman..7:39min. _aIocyHc

Evolution of Populations Chapter : Genes and Variation Population: group of individuals in the same species that interbreed; share a common gene.

11.1 Genetic Variation Within Population KEY CONCEPT A population shares a common gene pool.

EVOLUTION Descent with Modification. How are these pictures examples of Evolution?

Population Genetics and Speciation Chapter 16. Evolution O. Understand the mechanisms that can cause change in the genetics of a population. J. Explain.

Chapter 16 Section 1 Genes and Variation

KEY CONCEPT A population shares a common gene pool.

Populations, Gene Pools, & Microevolution

Evolution of Populations

The Genetics of Evolution

Evolution of Populations

Evolution as Genetic Change

V. How Does Evolution Work?

Reminder: Populations

PROCESS OF EVOLUTION.

Evolution of Populations

KEY CONCEPT A population shares a common gene pool.

Evolution of Populations: Part I

KEY CONCEPT A population shares a common gene pool.

Population Variation.

KEY CONCEPT A population shares a common gene pool.

KEY CONCEPT A population shares a common gene pool.

Mechanisms for Evolution

GENE POOL All the genes of all members of a particular population.

KEY CONCEPT A population shares a common gene pool.

HMD Bio CH 11.1 KEY CONCEPT A population shares a common gene pool.

CORNELL NOTES: Mechanisms of Evolution

Section 7 Quiz Review.

Diversity of Life Species Gene pool.

Phenotype, Genotype and the Environment

KEY CONCEPT A population shares a common gene pool.

Natural Selection Natural selection: organisms with favorable traits for a particular environment survive, reproduce, and pass these traits on to the next.

Population Evolution Chapter23.

Biological Evolution and Environmental Factors

Evolution of Populations

Evolution of Populations

KEY CONCEPT A population shares a common gene pool.

15.2 Mechanisms of Evolution

V. How Does Evolution Work?

KEY CONCEPT A population shares a common gene pool.

A population shares a common gene pool.

KEY CONCEPT A population shares a common gene pool.

Presentation transcript:

AP Chapter 23.2

Mutation  Variation  Natural Selection  Speciation Organisms better suited to the environment SURVIVE & REPRODUCE at a greater rate than those less suited to the environment and this is how… SPECIES EVOLVE

Mutation  Variation  Natural Selection  Speciation

1. Macroevolution (Speciation): Changes which occur at or above the species level 2. Microevolution (Population Genetics): Changes which occur within the species level Microevolution is awesome!

Microevolution: A small scale shift in allele frequencies over time Mechanisms for Microevolution: 1. Mutations/Recombination 2. Genetic Drift 3. Gene Flow 4. Natural Selection I still love math!

Rarely impact plants and animals 1/100,000 genes 98% of our DNA is junk (noncoding) Somatic cell mutations die with animal Only Gamete mutations are inherited

Once a mutation occurs, nearly all phenotypic variations will result from shuffling of existing alleles

Changes in the gene pool of a population Typical Effect: decrease in genetic variation The smaller the population, the greater the effect

Small population survives a disaster

Small population is responsible for colonization

Individuals from different populations interbreed Result of immigration/emigration

Promotes favorable traits Disposes unfavorable traits

Changes in the biosphere, select better suited alleles

Individuals choose mates based on particular traits

Changes that affect the gene pool of a population Mutation  Variation  Natural Selection  Speciation