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PSYC-125 CH 1

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Question
Answer
Genes   Units of hereditary that keep their identity from one generation to the next. Come in pairs of chromosomes (strands of genes).  
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Physiological   Relates a behavior to the activity of the brain and other organs. IE: machinery of the body like the routes brain activity takes to control muscle contractions.  
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Biological Explanations of behaivor (4)   Physiological, Ontogenetic, Evolutionary, and Functional.  
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Ontogenetic   How a structure or behavior develops, including the influences of genes, nutrition, etc. Reflects gradual maturation of frontal lobe.  
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Evolutionary   Reconstructs the evolutionary history of a structure or behavior. We inherit the mechanism from a behavior evolved in our ancestors.  
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Functional   Why a structure or behavior evolved as it did. An example being animals with camouflage making them inconspicuous.  
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Homozygous   Same pair of genes on two chromosomes.  
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Heterozygous   Unmatched pair of genes on two chromosomes.  
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Sex-Linked Genes   Genes on the sex chromosomes.  
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Autosomal Genes   All other genes on the autosomal chromosomes.  
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Sex-Limited Genes   Present in both sexes, generally on atsml chrmsms. Active mainly in one sex due to specific sex hormones in one sex or the other.  
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Epigenetics   Deals with changes in gene expression without modification of the DNA sequence.  
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