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UNIT 3C

UNIT 3C: Biological Bases of Behavior

QuestionAnswer
behavior genetics the study of the relative power and limits of genetic and environmental influences on behavior
environment every non-genetic influence, from prenatal nutrition to the people and things around us
chromosomes threadlike structures made of DNA molecules that contain the genes
DNA 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, crating two genetically identical organisms
fraternal twins twins who develop from separate fertilized eggs they are genetically no closer than brothers and sisters, but they share a fetal environment
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 heredity)
molecular genetics the subfield of biology that studies the molecular structure and function of genes
evolutionary psychology the study of the evolution of behavior and the mind, using principles of natural election
natural selection the principle that, among the range of inherited trait variations, those that lead to increased 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: jsancc
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