Presentation is loading. Please wait.

Presentation is loading. Please wait.

There are three general outcomes of natural selection Number of individuals Original population Phenotypes (fur color) Original population Evolved population.

Published byNorah Weaver Modified over 8 years ago

Similar presentations

Presentation on theme: "There are three general outcomes of natural selection Number of individuals Original population Phenotypes (fur color) Original population Evolved population."— Presentation transcript:

1 There are three general outcomes of natural selection Number of individuals Original population Phenotypes (fur color) Original population Evolved population Stabilizing selectionDirectional selectionDisruptive selection

2 Original Population TALLSHORT INTERMEDIATE BELL CURVE

3 Directional Selection Neck of Giraffe Moth color (melanin) Camouflage/Mimicry

4 Stabilizing Selection When the extremes of the trait aren’t as well suited Examples bird clutch size Human birth weight Human height

5 Disruptive Selection Causes divergence within the species Occurs when two different types of resources in one area Results in specialization for each branched group May lead to formation of new species E.g. Darwin’s Finches

6

Download ppt "There are three general outcomes of natural selection Number of individuals Original population Phenotypes (fur color) Original population Evolved population."

Similar presentations

Natural Selection 1. Do we see the same variation within different wild species that we do in domesticated ones like dogs, pigeons and horses?

Natural Selection 1. Do we see the same variation within different wild species that we do in domesticated ones like dogs, pigeons and horses?
Natural Selection the process whereby organisms better adapted to their environment tend to survive and produce more offspring It is a two step process:

Natural Selection the process whereby organisms better adapted to their environment tend to survive and produce more offspring It is a two step process:
Evolution of Populations

Evolution of Populations
Chapter 16: Evolution of Populations

Chapter 16: Evolution of Populations
Chapter 16.  What Darwin didn’t know…. ◦ How traits were inherited ◦ What caused variations.

Chapter 16.  What Darwin didn’t know…. ◦ How traits were inherited ◦ What caused variations.
Natural Selection It is a two step process:

Natural Selection It is a two step process:
16-1 Genes and Variation In genetic terms, evolution is any change in the relative frequency of alleles in a population. Gene pool is the combined genetic.

16-1 Genes and Variation In genetic terms, evolution is any change in the relative frequency of alleles in a population. Gene pool is the combined genetic.
Lesson Overview 17.1 Genes and Variation.

Lesson Overview 17.1 Genes and Variation.
Modern View of Evolution: Genetic Change. Genes and Variation.

Modern View of Evolution: Genetic Change. Genes and Variation.
Main Points of Darwin’s Theory of Natural Selection

Main Points of Darwin’s Theory of Natural Selection
BIG IDEA 1: Evolution Evolution as a Process Selection as a Mechanism Evidence for Evolution HW Equilibrium Speciation Origin of Life.

BIG IDEA 1: Evolution Evolution as a Process Selection as a Mechanism Evidence for Evolution HW Equilibrium Speciation Origin of Life.
Exploring Darwin & His Ideas  Think about the following questions: –What explains the explosion of living creatures on Earth—1.4 million different species.

Exploring Darwin & His Ideas  Think about the following questions: –What explains the explosion of living creatures on Earth—1.4 million different species.
Theory of Evolution. Evolution Inherited change over time, eventually causing creation of new species. Inherited change over time, eventually causing.

Theory of Evolution. Evolution Inherited change over time, eventually causing creation of new species. Inherited change over time, eventually causing.
Evolution EVOLUTION OF POPULATIONS. Three Cases of Variation What specifically causes the change in each of these populations of organisms:What specifically.

Evolution EVOLUTION OF POPULATIONS. Three Cases of Variation What specifically causes the change in each of these populations of organisms:What specifically.
TYPES OF NATURAL SELECTION.  Directional Selection  Stabilizing Selection  Disruptive Selection DEFINE IN YOUR NOTES.

TYPES OF NATURAL SELECTION.  Directional Selection  Stabilizing Selection  Disruptive Selection DEFINE IN YOUR NOTES.
Main Points of Darwin’s Theory of Natural Selection 1.Over production. Most organisms produce more offspring than can survive. 2.Competition. Organisms.

Main Points of Darwin’s Theory of Natural Selection 1.Over production. Most organisms produce more offspring than can survive. 2.Competition. Organisms.
Warm Up 1-31-13 1. Which process is responsible for bacteria becoming increasingly resistant to antibiotics (medicine that kills bacteria)? (Hint: Think.

Warm Up Which process is responsible for bacteria becoming increasingly resistant to antibiotics (medicine that kills bacteria)? (Hint: Think.
Chapter 16 Notes Spring 2006 Mr. Holmes.  Darwin’s problem was that he did not understand inheritance. Although Mendel’s work was published during Darwin’s.

Chapter 16 Notes Spring 2006 Mr. Holmes.  Darwin’s problem was that he did not understand inheritance. Although Mendel’s work was published during Darwin’s.
EVOLUTIONEVOLUTIONEVOLUTIONEVOLUTION. Questions to Ponder TRUE/FALSE 1. You can web your hands if you try. 2. You can acquire traits in your lifetime.

EVOLUTIONEVOLUTIONEVOLUTIONEVOLUTION. Questions to Ponder TRUE/FALSE 1. You can web your hands if you try. 2. You can acquire traits in your lifetime.
Chapter 16 Evolution of Populations. Ch. 16 Evolution of Populations 16–1Genes and Variation A.How Common is Genetic Variation? –Most genes have two forms.

Chapter 16 Evolution of Populations. Ch. 16 Evolution of Populations 16–1Genes and Variation A.How Common is Genetic Variation? –Most genes have two forms.

Similar presentations

Ads by Google