15.1 History Of Evolutionary Thought
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15.1 - History of Evolutionary Thought
Chapter 15
Section 1 History of Evolutionary Thought
The Idea of Evolution
Evolution - the change in the gene frequencies of a population over generational time.
Section 1 History of Evolutionary Thought
Chapter 15 The Definition of Evolution, explained
Gene Frequency - The measure of the occurrence of an allele in relation to that of other alleles of the same gene in a population.
QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
The Definition of Evolution, explained Population
A group of organisms that are able to interbreed.
What natural barriers would prohibit an organism from interbreeding? Example: Kodiak Bear
QuickTimeª and a decompressor are needed to see this picture.
QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
The Definition of Evolution, explained Generational Time
From one generation to the next. (Not within the same generation!) QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
The Definition of Evolution, explained Generational Time Lamarck’s Flawed Theory http://my.hrw
.com/sh/hm6_0030367514/student/media swf
Chapter 15 Charles
Section 1 History of Evolutionary Thought
Darwin’s Contribution QuickTimeª and a decompressor are needed to see this picture.
QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
Darwin’s Ideas Descent with Modification
Darwin wrote On the Origin of Species, in which he argued that 1 descent with modification occurs, 2that all species descended from common ancestors, and 3that natural selection is the mechanism for evolution.
Chapter 15
Section 1 History of Evolutionary Thought
Darwin’s Ideas, continued Natural Selection
Organisms in a population adapt to their environment as the proportion of individuals with genes for favorable traits increases. Those individuals that pass on more genes are considered to have greater fitness.
Natural Selection
http://my.hrw
.com/sh/hm6_0030367514/student/media swf
Adaptation
http://my.hrw.com/sh/hm6_0030367514/
Fitness
http://my.hrw .com/sh/hm6_0030367514/student/media swf
Chapter 15
Section 1 History of Evolutionary Thought
The Idea of Evolution
Evolution - the change in the gene frequencies of a population over generational time.
Section 1 History of Evolutionary Thought
Chapter 15 The Definition of Evolution, explained
Gene Frequency - The measure of the occurrence of an allele in relation to that of other alleles of the same gene in a population.
QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
The Definition of Evolution, explained Population
A group of organisms that are able to interbreed.
What natural barriers would prohibit an organism from interbreeding? Example: Kodiak Bear
QuickTimeª and a decompressor are needed to see this picture.
QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
The Definition of Evolution, explained Generational Time
From one generation to the next. (Not within the same generation!) QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
The Definition of Evolution, explained Generational Time Lamarck’s Flawed Theory http://my.hrw
.com/sh/hm6_0030367514/student/media swf
Chapter 15 Charles
Section 1 History of Evolutionary Thought
Darwin’s Contribution QuickTimeª and a decompressor are needed to see this picture.
QuickTimeª and a decompressor are needed to see this picture.
Chapter 15
Section 1 History of Evolutionary Thought
Darwin’s Ideas Descent with Modification
Darwin wrote On the Origin of Species, in which he argued that 1 descent with modification occurs, 2that all species descended from common ancestors, and 3that natural selection is the mechanism for evolution.
Chapter 15
Section 1 History of Evolutionary Thought
Darwin’s Ideas, continued Natural Selection
Organisms in a population adapt to their environment as the proportion of individuals with genes for favorable traits increases. Those individuals that pass on more genes are considered to have greater fitness.
Natural Selection
http://my.hrw
.com/sh/hm6_0030367514/student/media swf
Adaptation
http://my.hrw.com/sh/hm6_0030367514/
Fitness
http://my.hrw .com/sh/hm6_0030367514/student/media swf
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