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psych- exam 1- chapter 4
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29
Psychology
Undergraduate 2
09/18/2011

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Term
behavior genetics
Definition
the study of the relative power and limits of genetic and environmental influences on behavior.
Term
environment
Definition
every nongenetic influence, from prenatal nutrition to the people and things around us.
Term
chromosomes
Definition
threadlike structures made of DNA molecules that contain the genes.
Term
DNA
Definition
a complex molecule containing the genetic information that makes up the chromosomes.
Term
genes
Definition
the biochemical units of a heredity that make up the chromosomes; a segment of DNA capable of synthesizing a protein.
Term
genome
Definition
the complete instructions for making an organism, consisting of all the genetic material in that organisms chromosomes.
Term
identical twins
Definition
twins who develop from a single fertilized egg that splits in two, creating two genetically identical organsims.
Term
fraternal twins
Definition
twins who develop from separate fertilized egs. They are gentically no closer than brothers and sisters, but they share a fetal environment.
Term
temperament
Definition
a person's characteristic emotionaly reactivity and intensity.
Term
heritability
Definition
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.
Term
interaction
Definition
the interplay that occurs when the effect of one factor( such as environment) depends on another factor( such as heredity).
Term
molecular genetics
Definition
the subfied of biology that studies the molecular structure and function of genes.
Term
evolutionary psychology
Definition
the study of the evolution of behavior and the mind, using principles of natural selection.
Term
natural selection
Definition
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.
Term
mutation
Definition
a random error in gene replication that leads to a change.
Term
gender
Definition
in psychology, the biologically and socially influenced characteristics by which people define male and female.
Term
norm
Definition
an understood rule for accepted and expected behavior. norms prescribe "proper" behavior.
Term
personal space
Definition
the buffer zone we like to maintain around our bodies.
Term
individualism
Definition
giving priority to one's own goals over group goals and defining one's identity in terms of personal attributes rather than group identifications.
Term
collectivism
Definition
giving priority to goals of one's group(often one's extended family or work group) and defining one's identity accordingly.
Term
aggression
Definition
physical or verbal behavior intended to hurt someone.
Term
x- chromosome
Definition
the sex chromosome found in both men and women. Females have two x-chromosomes; males have one. An x chromosome from each parent produces a female child.
Term
Y chromosome
Definition
the sex chromosome found only in males. When paired with an x chromosome from the mother, it produces a male child.
Term
testostorone
Definition
the most important of the male sex hormones. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs in the fetus and the development of the male sex charactersistics during puberty.
Term
role
Definition
a set of expectations ( norms) about a social position, defining how those in the position ought to behave.
Term
gender role
Definition
a set of expected behaviors for males or for females.
Term
gender identity
Definition
our sense of being male or female.
Term
gender typing
Definition
the acquistion of a traditional masculine or feminine role.
Term
social learning theory
Definition
the theory that we learn social behavior by observing and imitating and by being rewarded or punished.
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