1 / 7

Understanding Speciation in Evolutionary Biology

Explore the concepts of selection, speciation, and evolution in populations, genetics, and inheritance. Learn about the limiting case of panmixia and its impact, as well as the importance of adaptation and genetic diversity.

clodia
Télécharger la présentation

Understanding Speciation in Evolutionary Biology

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BIO 110, Life Science Summer 2012

  2. Readings • Text • pp. 260-264: Selection • pp. 271-277 (speciation), look over the rest of Chapter 14 • Chapter 13: population evolution • Wikipedia • http://en.wikipedia.org/wiki/Panmixia

  3. Panmixia • Equal probability of sexual reproduction with any potential mate • Theoretical limiting case used by population geneticists • Some organisms approach panmixia, but uncommon

  4. Selection • Higher reproductive output = greater contribution to the next generation • Some examples • Selection is often equated with adaptation, but this can be misleading • Some examples • Selection doesn’t play well with panmixia

  5. Speciation • Speciation is the antidote to sex • What are species? • Separate species mean separate packages of adaptive features. • Restriction of interbreeding • Before fertilization • After fertilization

  6. Evolutionary biology • Speciation is a key process • Genetics of individuals and populations • Evolution of diversity

  7. Inheritance • Genes and alleles • Dominant and recessive • Simple and complex • The effects of selection

More Related