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AP Psychology - Unit 3C Vocabulary Review

Genetics, Evolutionary Psychology and Behavior

Behavior geneticsthe study of the relative power and limits of genetic and environmental influences on behavior.
Environmentevery non-genetic influence, from prenatal nutrition to the people and things around us.
Chromosomesthreadlike structures made of DNA molecules that contain the genes.
DNAa complex molecule containing the genetic information that makes up the chromosomes.
Genesthe biochemical units of heredity that make up the chromosomes; segments of DNA capable of synthesizing a protein.
Genomethe complete instructions for making an organism, consisting of all the genetic material in that organism’s chromosomes.
Heritabilitythe 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.
Identical Twinsdevelop from a single fertilized egg that splits in two, creating two genetically exact organisms.
Fraternal Twinsdevelop from separate fertilized eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment.
Interactionthe interplay that occurs when the effect of one factor (such as environment) depends on another factor (such as heredity).
Molecular Geneticsthe subfield of biology that seeks to identify specific genes influencing behavior and the structure and function of those genes.
Evolutionary Psychologythe study of the changes in behavior and the mind that have taken place during mankind’s history using the principles of natural selection
Natural Selectionthe 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.
Mutationthe random error in gene replication that leads to a change.

Swansboro High School

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