Chp.16 - Evolution of Populations 16-1 Genes and Variation 16-2 Evolution as Genetic Change 16-3 The Process of Speciation...
Darwin’s Ideas <ul><li>1910 Biologists began to realize that genes carry information that determines traits  </li></ul><ul...
Gene Pool & Relative Frequency <ul><li>Gene Pool - Combined genetic information of all the members of a particular populat...
Sources of Genetic Variation <ul><li>Mutations </li></ul><ul><li>Gene Shuffling </li></ul>Ramtin
Single-Gene and Polygenic Traits <ul><li>Single-Gene Trait </li></ul><ul><li>Polygenic Trait </li></ul>Dassel
Natural Selection <ul><li>Natural Selection on single-gene traits can lead to changes in allele frequencies and thus to ev...
Genetic Drift & Genetic Equilibrium <ul><li>Genetic Drift </li></ul><ul><li>Genetic Equilibrium  </li></ul><ul><li>- Rando...
Reproductive Isolation <ul><li>Reproductive Isolation - when the members of two populations cannot interbreed and produce ...
Speciation  <ul><li>Founders arrive  </li></ul><ul><li>Separation of populations </li></ul><ul><li>Changes in gene pool </...
Upcoming SlideShare
Loading in …5
×

6 Chapter16

823 views
771 views

Published on

Published in: Technology, Art & Photos
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
823
On SlideShare
0
From Embeds
0
Number of Embeds
13
Actions
Shares
0
Downloads
11
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

6 Chapter16

  1. 1. Chp.16 - Evolution of Populations 16-1 Genes and Variation 16-2 Evolution as Genetic Change 16-3 The Process of Speciation By: Ramtin N. & Dassel Pak
  2. 2. Darwin’s Ideas <ul><li>1910 Biologists began to realize that genes carry information that determines traits </li></ul><ul><li>Now biologists are able to explain how evolution takes place </li></ul>Dassel
  3. 3. Gene Pool & Relative Frequency <ul><li>Gene Pool - Combined genetic information of all the members of a particular population </li></ul><ul><li>Relative Frequency - Number of times that an allele occurs in a gene pool other than others </li></ul>Ramtin
  4. 4. Sources of Genetic Variation <ul><li>Mutations </li></ul><ul><li>Gene Shuffling </li></ul>Ramtin
  5. 5. Single-Gene and Polygenic Traits <ul><li>Single-Gene Trait </li></ul><ul><li>Polygenic Trait </li></ul>Dassel
  6. 6. Natural Selection <ul><li>Natural Selection on single-gene traits can lead to changes in allele frequencies and thus to evolution </li></ul><ul><li>Directional Selection </li></ul><ul><li>Stabilizing Selection </li></ul><ul><li>Disruptive Selection </li></ul>Dassel
  7. 7. Genetic Drift & Genetic Equilibrium <ul><li>Genetic Drift </li></ul><ul><li>Genetic Equilibrium </li></ul><ul><li>- Random mating </li></ul><ul><li>- Large population </li></ul><ul><li>- No movement into or out of the population </li></ul><ul><li>- No mutations </li></ul><ul><li>- No Natural Selection </li></ul>Ramtin
  8. 8. Reproductive Isolation <ul><li>Reproductive Isolation - when the members of two populations cannot interbreed and produce fertile offspring </li></ul><ul><li>Behavioral Isolation </li></ul><ul><li>Geographic Isolation </li></ul><ul><li>Temporal Isolation </li></ul>Dassel
  9. 9. Speciation <ul><li>Founders arrive </li></ul><ul><li>Separation of populations </li></ul><ul><li>Changes in gene pool </li></ul><ul><li>Reproductive Isolation </li></ul><ul><li>Ecological Competition </li></ul><ul><li>Continued Evolution </li></ul>Ramtin

×