Biology - Chp 16 - Evolution Of Populations - Powerpoint

Chapter 16 Evolution of Populations

16-1 Genes and Variation ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

How Common Is Genetic Variation? ,[object Object],[object Object]

Variation and Gene Pools ,[object Object]

Population ,[object Object],[object Object]

Relative Frequency ,[object Object],[object Object]

Sources of Genetic Variation ,[object Object]

Mutations ,[object Object],[object Object],[object Object],[object Object],[object Object]

Gene shuffling during sexual reproduction ,[object Object],[object Object],[object Object],[object Object]

Single – Gene and Polygenic Traits ,[object Object]

Single – gene trait ,[object Object],[object Object]

Polygenic traits ,[object Object],[object Object],[object Object],[object Object]

16-2 Evolution as Genetic Change ,[object Object],[object Object],[object Object],[object Object]

Evolution as Genetic Change ,[object Object],[object Object]

Natural Selection on Single – Gene Traits ,[object Object]

Natural Selection on Polygenic Traits ,[object Object]

1. Directional Selection ,[object Object]

2. Stabilizing Selection ,[object Object]

3. Disruptive Selection ,[object Object],[object Object]

Genetic Drift ,[object Object],[object Object]

Genetic Drift ,[object Object]

Genetic Drift ,[object Object],[object Object],[object Object]

Founder effect ,[object Object]

Evolution vs. Genetic Equilibrium ,[object Object]

Hardy – Weinberg principle ,[object Object]

Genetic equilibrium ,[object Object]

5 conditions are required to maintain genetic equilibrium ,[object Object],[object Object],[object Object],[object Object],[object Object]

16-3 The Process of Speciation ,[object Object],[object Object]

Isolating Mechanisms ,[object Object],[object Object]

Reproductive isolation ,[object Object]

Behavioral Isolation ,[object Object]

Geographical Isolation ,[object Object]

Temporal Isolation ,[object Object],Rana aurora - breeds January - March Rana boylii - breeds late March - May

Testing Natural Selection in Nature ,[object Object],[object Object]

[object Object],[object Object]

Variation ,[object Object],[object Object]

Natural Selection ,[object Object],[object Object],[object Object],[object Object],[object Object]

Natural Selection ,[object Object]

Speciation in Darwin’s Finches ,[object Object]

Founders Arrive ,[object Object],[object Object]

Geographic Isolation ,[object Object],[object Object]

Changes in the Gene Pool ,[object Object]

Reproductive Isolation ,[object Object],[object Object],[object Object]

Ecological Competition ,[object Object],[object Object]

Continued Evolution ,[object Object],[object Object]

Studying Evolution Since Darwin ,[object Object],[object Object],[object Object],[object Object]

Limitations of Research ,[object Object],[object Object]

Unanswered Questions ,[object Object],[object Object]

Why Understanding Evolution is Important? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Biology - Chp 16 - Evolution Of Populations - Powerpoint

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Biology - Chp 16 - Evolution Of Populations - Powerpoint