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03-Origins of mind - #$#$/0,1'2 Origins of mind Objectives...

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Lecture outline 1. Do genes control behavior? A. Surprising anecdotes from twin studies (Holden, 1980) B. Behavioral genetics looks for connections between genes and behavior. C. Findings that seem implausible i. Religiosity is 50% heritable. ii. A gene for smoking? D. From genes to behavior i. Genes a. We have 23 pairs of chromosomes. together containing 20,000 – 25,000 “genes.” b. Each “gene” is a set of dozens or thousands of DNA base pairs . c. Each DNA base pair is one of two possible combinations. ii. Genes encode phenotypic features dynamically . a. Genes turn on and off in response to other genes and to the physiological environment. b. Proteins interact with other proteins to form anatomical structures. c. Brain structures interact with each other to give rise to behavior. 1 Objectives 1. At the end of this unit, you should be able. . . 1. to explain the relation between DNA and behavior; 2. to describe major dimensions and trends in the evolution of the brain; and. . . 3. to describe some proposed adaptations in human thought and behavior and how these follow from evolutionary theory. !"#$%&’&(# )*+ -*./0 1/’’2# !"#$ %&#’()*+#"(& #( Origins of mind Protein Other proteins Environment Behavior Gene Other genes Brain structures in interaction
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iii. The environment interacts with these processes at every stage.
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