Chapter 3 Nature and Nurture of Behavior. Every nongenetic influence, from prenatal nutrition to the people and things around us. environment.

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Presentation transcript:

Chapter 3 Nature and Nurture of Behavior

Every nongenetic influence, from prenatal nutrition to the people and things around us. environment

The study of the relative power and limits of genetic and environmental influences on behavior. behavior genetics

Threadlike structures made of DNA molecules that contain the genes. chromosomes

A complex molecule containing the genetic information that makes up the chromosomes. DNA (deoxyribonucleic acid)

The biochemical units of heredity that make up the chromosomes; a segment of DNA capable of synthesizing a protein. genes

The complete instructions for making an organism, consisting of all the genetic material in that organism’s chromosomes.. genome

Twins who develop from a single fertilized egg that splits in two, creating two genetically identical organisms. identical twins

Twins who develop from separate fertilized eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment. fraternal twins

A person’s characteristic emotional reactivity and intensity. temperament

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. heritability

The effects of one factor (such as environment) depends on another factor (such as heredity). interaction

The subfield of biology that studies the molecular structure and function of genes. molecular genetics

The study of the evolution of behavior and the mind, using the principles of natural selection. evolutionary psychology

The principle that, among the range of inherited trait variations, those that lead to increased reproduction and survival will most likely to be passed on to succeeding generations. natural selection

A random error in gene replication that leads to a change. mutation

In psychology, the biologically and socially influenced characteristics by which people define male and female. gender

The enduring behaviors, ideas, attitudes, values, and traditions shared by a group of people and transmitted from one generation to the next. culture

An understood rule for accepted and expected behavior. (Prescribe “proper” behavior.) norm

The buffer zone we like to maintain around our bodies. personal space

individualism Giving priority to one’s own goals over group goals and defining one’s identity in terms of personal attributes rather then group identification.

collectivism Giving priority to the goals of one’s group (often one’s extended family or work group) and defining one’s identity accordingly.

aggression Physical or verbal behavior intended to hurt someone.

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. X chromosome

The sex chromosome found only in males. When paired with an X chromosome from the mother, it produces a male child. Y chromosome

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 characteristics during puberty. testosterone

A set of expectations (norms) about a social position, defining how those in the position our to behave. role

A set of behaviors for males and for females. gender role

One’s sense of being male or female. gender identity

The acquisition of a traditional masculine feminine role. gender-typing

The theory that we learn social behavior by observing and imitating and by being rewarded or punished. social learning theory

The 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. gender schema theory