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Myers chapter 3 vocab

Chapter 3 vocabulary from Myers eighth edition.
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Environment
Every non-genetic influence, from prenatal nutrition to the people and things around us.
Behavior genetics
The study of the relative power and limits of genetic and environmental influences on behavior.
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; a segment 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, but they share a fetal environment.
Temperament
A person's characteristic emotional reactivity and intensity.
Heritability
The proportion of variation among individuals that we can attribute to genes.
Interaction
The effect of one factor (such as the 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 selection.
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.
Gender
In psychology, the biologically and socially influenced characteristics by which people define male and female.
Culture
The enduring behaviors, ideas, attitudes, values, and traditions shared by a group of people and transmitted from one generation to the next.
Norm
An understood rule for accepted and expected behavior.
Personal space
The buffer zone we like to maintain around our bodies.
Individualism
Giving priority to one's own goals over group coals and defining one's identity in terms of personal attributes rather than group identification.
Collectivism
Giving priority to the goals of one's group and defining one's identity accordingly
Aggression
Physical or verbal behavior intended to hurt someone.
X chromosome
The sex chromosome found in both men and women.
Y chromosome
The sex chromosome found only in males.
Testosterone
The most important of the male sex hormones.
Role
A set of expectations about a social position, defining how those in the position ought to behave.
Gender role
A set of expected behaviors for males and for females.