Ch 4.1 Nature vs. Nurture

Behavior genetics

Study of relative power and limits of genetic and environmental influences on behavior

Environment

Nongenetical influence

Chromosomes

Threadlike structures made of DNA molecules that contain the genes

DNA

Molecules that makes up the chromosomes, contain the genetic info

Genes

The biochemical units of heredity that make up the chromosomes

Genome

Consisting of all the genetical material in that organism’s chromosomes

Identical twins

Developed from a single fertilized egg which split into two

Fraternal twins

Developed from two separate fertilized eggs

Temperament

A person’s characteristic emotion activity and intensity

Heritability

The proportion of variation among individuals

Molecular genetics

Study of the molecular structure and functions of genes

Molecular behavior genetics

Study of how the structure and functions of genes interact with our environment to influence behavior

Epigenetics

Study of environmental influences on gene expression that occur without DNA change