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PSY1102 Midterm Review

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PSY1102 Psychology Midterm ReviewChapter FourBehaviour Genetics The study of the relative power and limits of genetic and environmental influences on behaviour Environment Every nongenetic influence from prenatal nutrition to the people and things around usChromosomes Threadlike structures made of DNA molecules that contain the genesDNA A complex molecule containing the genetic information that makes up the chromosomeGenes The biochemical units of heredity that make up the chromosomes a segment of DNA capable of synthesizing a proteinGenome The complete instructions for making an organism consisting of all the genetic material in that organisms chromosomes Identical Twins Twins who develop from a single fertilized egg that splits in two creating two genetically identical organismsFraternal Twins Twins who develop from separate fertilized eggs They are genetically no close than brothers and sisters but they share a fetal environmentTemperament A persons characteristic emotional reactivity and intensity Heritability The proportion of variation among individuals that we can attribute to genes The heritability of a trait may vary depending on the range of populations and environments studied Interaction The interplay that occurs when the effect of one factor such as environment depends on another factor such as heredityMolecular Genetics The subfield of biology that studies the molecular structure and function of genesEvolutionary Psychology The study of the evolution of behaviour and the mind using principles of natural selectionNatural Selection The principle that among the range of inherited trait variations those that lead to increase reproduction and survival will most likely be passed on to succeeding generations
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