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Heredity & Environment: The Classic "Nature vs. Nurture" Debate

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Rob Frazier

on 3 October 2012

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Transcript of Heredity & Environment: The Classic "Nature vs. Nurture" Debate

Heredity & Environment: The Classic "Nature vs. Nurture" Debate What Conclusions
Can We Make? Behavior genetics is a field that attempts to discover how heredity and environment affect us and make us all different. It does not tell us the extent that each factor plays in determining our individual traits. Behavior Genetics Passive genotype-environment
correlations Correlations Between
Heredity & Environment Shared & Nonshared
Environmental Experiences The Epigenetic View &
Gene X Environment (G x E) Interaction Epigenetic View:
Suggests that the relationship between our genes and environmental influences works both ways. Evocative genotype-environment correlations Active genotype-environment
correlations Shared: experiences that siblings have in common, simply because they grow up with the same parents and surroundings. Nonshared: experiences, either within or outside of the family environment, that are unique to only one child. Gene X Environment (G x E) Interaction:
Newer studies suggest that some genetic traits are only "turned on" by outside environmental influences. Inherited tendencies combined with an environment that matches those tendencies. Characteristics that tend to elicit certain types of environments and responses from others. Occur when children actively seek out environments they find stimulating. Examples might be outgoing kids who seek social situations or musical kids who gravitate toward musical environments. Twin Studies
Compare the behavior of sets of identical and fraternal twins to better understand whether the differences and similarities are caused by genetics or environmental factors. Adoption Studies
Seek to compare the psychological characteristics and behavior of twins who have been separated at birth, in order to better understand the influences that could only be the result of genetics. These case studies frequently show remarkable similarities in lifestyle choices, eating habits, work preferences, etc. We'll probably never know exactly what percentages of
"Nature & Nurture" are combined to make us who we are.

There is no "set in stone" version of who we are,
or who we will be in the future.

We are not at the mercy of the genetic code we receive at birth.
Our environment, our habits, and even our own thoughts
can help to determine who and what we become. THANK YOU
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