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AP Psy 3C

Brain Biology

QuestionAnswer
Behavior genetics The study of the relative power and limits of genetic and environmental influences on behavior.
Environment Every nongenetic influence, from prenatal nutrition to the people and things around us
Chromosomes Threadlike structures made of DNA molecules that contain the genes.
DNA (Deoxyribonucleic acid) A complex molecule containing the genetic information that makes up the chromosomes
Genes The biochemical units of heredity that make up the chromosomes; segments of DNA capable of synthesizing a protein.
Genome The complete instructions for making an organism, consisting of all the genetic material in that organism’s chromosomes
Identical twins Twins who develop from a single fertilized egg that splits in two, creating two genetically identical organisms
Fraternal twins Twins who develop from separate fertilized eggs. They are genetically no closer than brothers and sisters, and they share a fetal environment
Heritability The proportion of variation among individuals that we can attribute to genes.
Interaction The interplay that occurs when the effect of one factor (such as environment) depends on another factor (such as heredity)
Molecular genetics The subfield of biology that studies the molecular structure and function of genes
Evolutionary psychology The study of the roots of behavior and mental processes using the principles of natural selection.
Natural selection The principle that, among the range of inherited trait variations, those contributing to reproduction and survival will most likely be passed on to succeeding generations.
Mutation A random error in gene replication that leads to a change
Created by: A. Shearer
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