the study of the relative power and limits of genetic and environmental influences of behavior
what is environment?
every nongenetic influence, from prenatal nutrition to the people and things around us
what are chromosomes?
threadlike structures made of DNA molecules that contain the genes
What is DNA?
a complex molecule containing the genetic information that makes up the chromosomes
the biochemical units of heredity that make up the chromosomes: segments of DNA capable of synthesizing a protein. Genes can be either active(expressed) or inactive
the complete instructions for making a organism, consisting of all the genetic material in that organism's chromosomes
twins who develop from a single (monozygotic) fertilized egg that splits in two, creating two genetically identical organisms
twins who develop from separate (dizygotic) fertilized eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment
a person's characteristic emotional reactivity and intensity.
the subfield of biology that studies the molecular structure and function of genes
the interplay that occurs when the effect of one factor(such as the environment) depends on another factor(such as heredity)
the study of influences on gene expression that occur without a DNA change
the study of the evolution of behavior and the mind, using principles of natural selection
the principle that, among the range of inherited trait variations, those contributing to increased reproduction and survival will most likely be passed on to succeeding generations
a random error in gene replication that leads to a change
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. The extent to which variation among individuals can be attributed to their differing genes
in psychology, the biologically and socially influenced characteristics by which people define male and female.