Ch. 3 Behavior Gene.ppt

1、Chapter 3,Behavior Genetics,The Human Genome,Genetic Roadmap Entire genetic code of the human species,Genetic Structures,DNA - Dioxyribonucleic Acid Genetic Code Genetic Alphabet = 4 Letters A: Adenine C: Cytosine G: Guanine T: Thymine,Genetic “Words”,Made up of two strands of DNA molecules Infinite

2、 in length (e.g. ACGCTCTCGA) Because DNA is a Double Helix exact replication is possible Mutations result when “proofreading fails,Chromosome,Continuous Strands of DNA Locations which have functions are Genes 46 Chromosomes in humans Located as 23 Pairs 22 Pairs are Autosomes 1 Pair are Sex Chromoso

3、mes,Gene = Location on Chromosome,“Parsimony” of Genetics,4 Bases (ACGT) produce enormous diversity Length NS=.24) (.76 =genotype + Shared Env. + error),Behavior Results from Interactions (Ross),Genetic Make-Up Interactional History Current Physiological Conditions Current Environmental Conditions B

4、ehavioral Dynamics,How Do Genes & Environment Interact?Genotype/Environment Effects,e.g., height, weight, muscles, hair color(?), skin color Passive Active Evocative,A Behavioral View: Person/Environment Interactions,e.g., clothing, make-up, behavior, skills, hair color? Passive Evocative Active,What Canalizes Behavior,Canalization Increasing restriction of outcome as development proceed