What is behavior genetics?
the study of the relative power and limits of genetic and environmental influences on behavior
What is environment?
every nongenetic influence, from prenatal nutrition to the people and things around us
What is 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.
What is genes?
the biochemical units of heredity that make up the chromosomes; a segment of DNA capable of synthesizing a protein
What are identical twins?
twins who develop from a single fertilized egg that spilts in two, creating two genetically identical organisms
What are fraternal twins?
twins who develop from separate fertilized eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment
