U of M ANTH 1001 - Lecture 3 9-12-17 Darwins Theories cont (4 pages)

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Lecture 3 9-12-17 Darwins Theories cont



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Lecture 3 9-12-17 Darwins Theories cont

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4
School:
University of Minnesota- Twin Cities
Course:
Anth 1001 - Human Evolution
Human Evolution Documents
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9 13 2017 Today s Objectives Finish Darwin s 5 Theories Watch Voyage to the Galapagos Elevator Digital Content Library on Moodle Sexual Selecton 2 2 1 9 13 2017 Darwin s 5 theories regarding evolution 1 2 3 4 5 Species change evolution as such All organisms share a common ancestry Evolution is gradual Evolution leads to speciation Evolution occurs through Natural Selection This is not ONE THEORY of evolution but SEVERAL THEORIES 3 The Three Necessary and Sufficient Conditions for Natural Selection 1 Variation in a trait 2 Inheritance of the trait 3 Differential reproductive success based on that trait 4 2 9 13 2017 Modes of Selection Title Effects of NS on mouse fur color before selection after selection Population before selection Population after selection 5 Evolution Natural Selection Natural selection is one mechanism that leads to evolution Adaptation the result of long term selection in one direction Adaptations occur in populations 6 3 9 13 2017 Perfect Adaptation Adaptations always have a cost and so there is an inherent trade off 7 7 Scientific American Voyage to the Galapagos video ID 4007593 dcl elevator umn edu 8 4


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