Darwinian evolution
This presentation is the property of its rightful owner.
Sponsored Links
1 / 21

Darwinian Evolution PowerPoint PPT Presentation


  • 45 Views
  • Uploaded on
  • Presentation posted in: General

Darwinian Evolution. What does natural selection suggest?. Darwinian Evolution. What does natural selection suggest? Organisms compete to survive Organisms produce more offspring than those that survive The fittest organisms survive They reproduce and pass on their genes.

Download Presentation

Darwinian Evolution

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Darwinian evolution

Darwinian Evolution

  • What does natural selection suggest?


Darwinian evolution1

Darwinian Evolution

  • What does natural selection suggest?

    • Organisms compete to survive

    • Organisms produce more offspring than those that survive

    • The fittest organisms survive

    • They reproduce and pass on their genes


Genetics lesson 3

Genetics Lesson 3


What assumptions need to be made for hardy weinberg

What assumptions need to be made for Hardy Weinberg?


Gene pool

Gene Pool

  • Why will it change?


Biston betularia

Biston betularia


Peppered moths

Peppered Moths

  • 1845 Industrial Revolution


Darwinian evolution

Darwin’s Finches


Selection

Selection

  • Selection may favour one particular allele = an advantageous allele

  • Selection may remove the extremes

  • The Environment has an effect on all genes

  • If the environment changes, the organisms best suited to survive will change


Selection pressures

Selection Pressures


Selection pressures1

Selection Pressures


Page 131 application

Page 131 – Application


How do new species come about

How do new Species come about?


Speciation

Speciation

  • Development of a new species


Geographical speciation

Geographical Speciation


Reproductive speciation

Reproductive Speciation


Reproductive speciation1

Reproductive Speciation

  • Oestrus

  • Mating Season

  • Anatomical changes

  • Behavioural changes


  • Login