Chapter 24 notes

Chapter 24 notes - Chapter 24 The Origin of Species Click...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style 6/13/11 Chapter 24 The Origin of Species
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6/13/11 Concept 24.1 The biological species concept emphasizes reproductive isolation Species: Latin for “kind” or “appearance”
Background image of page 2
6/13/11 Which pair is two different species Two pictures are shown: Picture of two identical looking dragon flies. Picture of one big dog (a great dane) and one tiny dog that look nothing alike. The dragon flies are not the same species because they are of two different species; whereas the dogs are of the same species. This proves that appearance is not a
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6/13/11 The Biological Species Concept Ernst Mayr Defines a species as a population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring. Cannot be applied to: Asexual organisms Fossils
Background image of page 4
6/13/11 Speciation Dependent on: Reproductive isolation No gene flow Genetic divergence
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Establishing Reproductive Isolation Fruit fly experiment Scientists raised two groups of fruit flies under two different conditions (starch medium and maltose medium) so that there would be genetic differences. After several generations, the two populations were brought back together to mate. These conditions caused reproductive
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/13/2011 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

Page1 / 28

Chapter 24 notes - Chapter 24 The Origin of Species Click...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online