 Debate surrounding the relative importance of heredity (nature) and environment (nurture) in determining behavior. NATURENURTURE Argue that hereditary factors play the major role in determining such characteristics as our intelligence, personality, and temperament. Argue that environment including our daily experiences, up bringing, and education are the major determinates of these characteristics.

 Genetics Study of how traits are transmitted from one generation to the next  Traits Characteristics on which organisms differ  Genes Control the transmission of traits; found on the chromosomes  Heredity Transmission of traits from one generation to the next

 Pairs of threadlike bodies within the cell nucleus that contain the genes  Humans have 23 pairs in every normal cell  Main ingredient is DNA

 Complex molecule in a double-helix configuration that is the main ingredient of chromosomes and forms the code for all genetic information

DOMINANT  Member of a gene pair that controls the appearance of a certain trait  For our example: B RECESSIVE  Member of a gene pair that can control the appearance of a certain trait only if it is paired with another recessive gene  For our example: b

 Process by which several genes interact to produce a certain trait; responsible for our most important traits  Not all effects will be immediate or fully apparent  Some may not show up based on behavior