ch_3 powerpoint (nature nurture)
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Transcript ch_3 powerpoint (nature nurture)
Myers’ PSYCHOLOGY
Chapter 3
The Nature and Nurture
Of Behavior
AP Psychology- Coach Sprenkle
Genes: Our Biological
Blueprint
Chromosomes
threadlike structures made of DNA that
contain the genes
DNA (deoxyribonucleic acid)
complex molecule containing the genetic
information that makes up the chromosomes
has two strands-forming a “double helix”held together by bonds between pairs of
nucleotides
Genes: Our Biological
Blueprint
Genes
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 its
chromosomes
Genetics and
Behavior
Nucleus
Cell
Chromosome
Gene
DNA
Behavior Genetics
Behavior Genetics
study of the power and limits of genetic
and environmental influences on
behavior
Environment
every nongenetic influence, from
prenatal nutrition to the people and
things around us
Behavior Genetics
Identical
twins
Fraternal
twins
Identical Twins
develop from a single
zygote (fertilized egg) that
splits in two, creating two
genetic replicas
Fraternal Twins
Same
sex only
Same or
opposite sex
develop from separate
zygotes
genetically no closer than
brothers and sisters, but
they share the fetal
environment
Behavior Genetics
Temperament
a person’s characteristic emotional
reactivity and intensity
Heritability
the proportion of variation among
individuals that we can attribute to
genes
may vary, depending on the range of
populations and environments studied
Behavior Genetics
Interaction
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
Natural Selection
the principle that, among the range of
inherited trait variations, those contributing to
survival will most likely be passed on to
succeeding generations
Mutations
random errors in gene replication that lead to
a change in the sequence of nucleotides
the source of all genetic diversity
Evolutionary Psychology
Evolutionary Psychology
the study of the evolution of behavior
using the principles of natural selection
Gender
in psychology, the characteristics,
where biologically or socially influenced,
by which people define male and female
Evolutionary Psychology
Men everywhere preferred attractive physical
features suggesting youth and health
Environmental
Influence
Two placental arrangements in identical
twins
Environmental
Influence
Experience affects brain development
Impoverished
environment
Rat brain
cell
Enriched
environment
Rat brain
cell
Environmental
Influence
A trained brain
Environmental
Influence
Culture
the enduring behaviors, ideas,
attitudes, and traditions shared by a
large group of people and transmitted
from one generation to the next
Norm
an understood rule for accepted and
expected behavior
Environmental
Influence
Personal Space
the buffer zone we like to maintain
around our bodies
Memes
self-replicating ideas, fashions, and
innovation passed from person to
person
The Nature and
Nurture of Gender
X Chromosome
the sex chromosome found in both men and
women
females have two; males have one
an X chromosome from each parent produces
a female
Y Chromosome
the sex chromosome found only in men
when paired with an X chromosome from the
mother, it produces a male child
The Nature and
Nurture of Gender
Testosterone
the most important of the male sex hormones
both males and females have it
additional testosterone in males stimulates
growth of male sex organs in the fetus
development of male sex characteristics during
puberty
Role
a set of expectations (norms) about a social position
defining how those in the position ought to behave
The Nature and
Nurture of Gender
Gender Role
a set of expected behaviors for males and
females
Gender Identity
one’s sense of being male or female
Gender-typing
the acquisition of a traditional masculine or
feminine role
The Nature and
Nurture of Gender
Social Learning Theory
theory that we learn social behavior by
observing and imitating and by being
rewarded or punished
Gender Schema Theory
theory that children learn from their cultures
a concept of what it means to be male and
female and that they adjust their behavior
accordingly
The Nature and
Nurture of Gender
Percentage agreeing “The activities of married
women are best confined to home and family”
70
Percentage
60
Men
50
40
30
20
10
Women
0
1967 ‘71 ‘75 ‘79 ‘83 ‘87 ‘91 ‘95
Year