Field of behavior genetics study of how heredity and

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interactions are more complex then previously believed. *Field of behavior genetics- study of how heredity and environment interact to influence psychological characteristics. *Concordance- Co-occurrence if a trait in people who are closely related. *Adoption Studies-Early adoptees are compared with both biological and adoptive genes. More similar to biological=strong influences of genes. Evolutionary Psychology- Problem of adoption to environments, result=evolved. *psychology mechanisms and behavioral strategies. What is evolution? Change over time in frequency with which genes, and characteristics they produce, occur within an interbreeding population. * Mutations, Create genetic variations, making evolution possible, Can be passed off to offspring. *Principles of Natural Selection (Darwin) *Characteristics more likely to be presented if they: 1. Increase the likelihood of survival, 2. increase the ability to reproduce. 3. allows for “evolutionary noise” or “neutral variations”. *Adaptation, Products of natural selection, Allows organisms to meet environmental challenges to their survival. *Neural and Hormonal Systems – Biological Psychologists- a branch of psychology that studies the link between biology and behavior. *Other names behavioral neuroscientist, Nero-psychologists, behavioral geneticists,
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psychologists. * Neuron- a nerve cell- the basic building block of the nervous system. *Dendrites-the bushy, branching extension of a neuron that receive messages and conduct impulses toward the cell body stimulation began.
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