Genetics and society
Download
1 / 13

Genetics and Society - PowerPoint PPT Presentation


  • 75 Views
  • Uploaded on

Genetics and Society. Everything’s Heritable. First Law. All human behavioral traits are heritable Second Law. The effect of being raised in the same family is smaller than the effect of genes

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 ' Genetics and Society' - tacy


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

Everything s heritable
Everything’s Heritable

  • First Law. All human behavioral traits are heritable

  • Second Law. The effect of being raised in the same family is smaller than the effect of genes

  • Third Law. A substantial portion of the variation in complex human behavioral traits is not accounted for by the (additive) effects of genes or families.


Genetic architecture
Genetic Architecture

  • Fourth Law: Genetic variants that are common in a population have very small individual effects on behavioral traits

  • Not always like this in other species

  • Can be different in subpopulations

  • Strong selection can change architecture



Selection
Selection

  • Every society selects for something

  • Usually unintended


Breeder s equation
Breeder’s Equation

  • R = h2S

  • R = response

  • h2 = narrow-sense heritability

  • S = selection differential


Selection can be fast or slow
Selection can be fast or slow

  • Interesting changes can happen in less than 1000 years

  • Maximum time available for human differentiation, ~100,000 years


Dan freedman s babies
Dan Freedman’s babies

  • Behavioral differences at birth


Populations classes jobs
Populations, Classes, Jobs

  • Selection changes populations

  • Classes change by selection and differential recruitment

  • Jobs, differential recruitment


Distributions
Distributions

  • Modest differences in the mean imply big differences at the extremes


Genetic isolation
Genetic Isolation

  • Geographic Separation

  • Endogamy


Epigenetic inheritance
Epigenetic Inheritance

  • Trendy

  • Rare

  • Hard to imagine adaptive mechanism

  • fuhgeddaboudit


Human capital formation
Human Capital Formation

  • Usual Model: Parents invest in human capital

  • Fewer kids is better

  • Not true for genetic contribution


ad