gene co option n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Gene co-option PowerPoint Presentation
Download Presentation
Gene co-option

Loading in 2 Seconds...

play fullscreen
1 / 19

Gene co-option - PowerPoint PPT Presentation


  • 224 Views
  • Uploaded on

Gene co-option. the process by which a trait/gene changes function; the gene has been co-opted to do a new job. Gene Co-option. Inheritance of Acquired Characteristics. Epigenetics turns on/off genes. http://cnx.org/content/m26565/latest/graphics35.jpg.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Gene co-option' - sileas


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
gene co option
Gene co-option
  • the process by which a trait/gene changes function; the gene has been
  • co-opted to do a new job
epigenetics turns on off genes
Epigenetics turns on/off genes

http://cnx.org/content/m26565/latest/graphics35.jpg

epigenetic patterns are heritable but can be changed by the environment more easily than can genes
Epigenetic patterns are heritable, but can be changed by the environment more easily than can genes

Jirtle and Skinner, 2007, Nature Reviews Genetics

epigenetics and behavior

Epigenetics and behavior

http://learn.genetics.utah.edu/content/epigenetics/rats/

darwin s finches
Darwin’s finches

Patel, 2006, Nature, 442:515-516

a second gene cam
A second gene… CaM

Beak morphology is skeletal and related to differences in CaM expression during development

Abzhanov et al., 2006, Nature, 442:563-567

up or down regulation of two genes can create a wide variety of 3 d shape
Up or down regulation of two genes can create a wide variety of 3-D shape

Abzhanov et al., 2006, Nature, 442:563-567

what explains darwin s finches1
What explains Darwin’s finches?
  • Difference in gene expression (high, moderate, or low) for two genes. What are the possible mechanisms?
    • Switch?
    • Gene duplication?
    • Epigenetics?
slide14

Mutations are accidents within the cell during DNA replication and during meiosis

  • These mutations happen with no regard to what is happening to the organism or to what the organism needs…
  • That doesn’t mean that some mutations aren’t lucky!
  • Mutation creates new alleles that can be selected for or against
gene pool all of the alleles in all of the gametes of the population
Gene Poolall of the alleles in all of the gametes of the population
  • Concept works for sexual reproducers
  • Alleles can unite randomly (as if swimming), or they can unite non-randomly if there is mating preference
slide17

Dawkins on “Gene Pools”“The very idea of a gene pool has no meaning if there is no sex. 'Gene Pool’ is a persuasive metaphor because the genes of a sexual population are being continually mixed and diffused, as if in a liquid.

richard dawkins the ancestor s tale page 432
-Richard Dawkins,The Ancestor's Tale , page 432

Bring in the time dimension, and the pool becomes a river, flowing through geological time..."