The Origin of Species. understanding speciation video ding-Speciation-150610251 ???http://www.5min.com/Video/Understan.

Slides:

Advertisements

Similar presentations

KEY CONCEPT New species can arise when populations are isolated.

Advertisements

Chapter 16 Population Genetics and Speciation

BIOSISTEMATIKA SEBAGAI DASAR BIOKONTROL

THE ORIGIN OF SPECIES CHAPTER 24.

Formation of Species A species is a population of organisms that can successfully interbreed but cannot breed with other groups. Existing species are changed.

Study of Microevolution

CHAPTER 14 The Origin of Species

What is a Species? There is only one extant (existing) human species.

AP Biology Speciation Modes. AP Biology *Speciation can take place with or without geographic isolation *Reproductive isolation prevents gene flow between.

Chapter 24 Notes The Origin of Species. There is more to evolution than just explaining how adaptations evolve in a population. Evolution must also explain.

Chapter 24 The Origin of Species.

Lecture #11 Date ________ Chapter 24 ~ The Origin of Species.

POPULATION GENETICS & SPECIATION

Copyright © 2009 Pearson Education, Inc. The origin of species is the source of biological diversity Speciation is the emergence of new species Every time.

I got nothin’ witty. Evolutionary Theory. How evolution takes place BIG IDEA: The theory of evolution is constantly changed as new evidence is discovered.

Speciation & Patterns of Evolution

LECTURE 8: Macroevolution. What is microevolution? –Evolution on a small scale –Change in allele frequencies from one generation to the next –A process.

Chapter 16 Objectives Section 1 Genetic Equilibrium

Formation of species. The process of species formation is called? Speciation Scientists use internal and external structures and appearances ( morphology.

Chapter 16 Section 1: Genetic Equilibrium. Variation of Traits In a Population Population Genetics Population Genetics –Microevolution vs. macroevolution.

Speciation How do we get new species on Earth?. What is a species? Remember: A species is a group of organisms that can breed and produce viable and fertile.

MECHANISMS OF EVOLUTION. POPULATIONS, NOT INDIVIDUALS, EVOLVE An organism cannot change its phenotype. A phenotype can become more predominant in a population,

CHAPTER 24 ORIGIN OF SPECIES “Macro-evolution”. “A place of genesis” Galapagos (Spanish for Tortoise) “Both in space and time, we seem to be brought somewhat.

How Different Species Arise. What is a species? A group of organisms that can interbreed and produce fertile offspring in nature. New species arise through.

Chapter 24: Speciation Objectives -Importance of reproductive isolation in the biological species concept -Speciation can take place with or without geographic.

THE ORIGIN OF SPECIES Chapter 24.

ORIGIN OF SPECIES CH 24. Speciation: origin of new species Microevolution: changes in allele frequencies Macroevolution: changes that result in formation.

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

The Origin of Species Chapter 24 Biology – Campbell Reece.

Speciation. What is a species? Biological species concept – a population or group of populations whose members have the potential to interbreed in nature.

SPECIATION Ch pp Warm up 3/2: Define: Homologous Structures, Analogous Structures and Vestigial Organs/Structures. Give 1 example of each.

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

Evolution Practice Test

Chapter 24 The Origin of Species.

Speciation Chapter 14 March 2014.

The origin of species is the source of biological diversity

The Origin of Species Chapter 24.

Ch. 14 The Origin of Species

Ch. 21 Warm-Up Use the following information to help you answer the question below: Population = 1000 people AA = 160 Aa = 480 aa = 360 What are the genotypic.

The Origin of Species.

Chapter 16 Table of Contents Section 1 Genetic Equilibrium

Mapping Human History.

Chapter 22 The Origin of Species.

KEY CONCEPT New species can arise when populations are isolated.

AP Biology Chapter 24 The Origin of Species.

2/24/14 Collect H-W practice sheet  ??? Evolution Quiz (Chp.15)

KEY CONCEPT New species can arise when populations are isolated.

Speciation, Macroevolution, and Microevolution

Ch. 21 Warm-Up Use the following information to help you answer the question below: Population = 1000 people AA = 160 Aa = 480 aa = 360 What are the genotypic.

Speciation -The definition of a new species is when it can NO LONGER REPRODUCE with the original population.

Chapter 17.3 (p ) Speciation.

KEY CONCEPT New species can arise when populations are isolated.

The Origin of Species Chapter 24.

Chapter 24 Notes The Origin of Species.

DNA and the Genome Key Area 7c Speciation.

Formation of Species Speciation.

Describe and explain the different types of speciation.

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

Chapter 24 The Origin of Species.

Population Genetics.

Chapter 24 The Origin of Species.

KEY CONCEPT New species can arise when populations are isolated.

Speciation Chapter 24.

Lecture #11 Date ________

KEY CONCEPT New species can arise when populations are isolated.

KEY CONCEPT New species can arise when populations are isolated.

Population Genetics & Speciation

KEY CONCEPT New species can arise when populations are isolated.

Presentation transcript:

The Origin of Species

understanding speciation video ding-Speciation ??? ding-Speciation

Speciation Species – population sharing a gene pool - group of organisms which can interbreed Speciation – changes in a population so that it can no longer breed with other populations of the same original species. Due to Genetic drift (chance) or Natural selection (not chance) in a population

Macroevolution is the origin of new species Microevolution is genetic variation within a species. A species is a population or group of populations whose members have the potential to interbreed with one another and produce viable offspring, but who cannot produce viable offspring with other species. Problems with this definition Breeds? eg dogs Extinct species? Cryptic species? (appear identical, but reproductively isolated)

The biological species concept is based on inter- fertility, rather than physical similarity.

Modes of speciation Modes of speciation 1. Allopatric speciation populations geographically separate. Gene flow is interrupted. 2. Sympatric speciation geographically overlapping populations. Chromosomal changes / nonrandom mating reduce gene flow. reproductively isolated Species arise when individuals in a population become reproductively isolated one from the other.

Videos Wolfe: What is a species? Qu3cm3CEhttp:// Qu3cm3CE