Biological

• What does the biological approach suggest about human behaviors and traits?

  They have a biological basis due to structures
• What is the focus of neurochemistry in relation to behavior?

  Action of chemicals in the brain
• How does the biological approach explain mental disorders?

  They are due to an imbalance of neurochemicals
• What mental disorders are linked to neurochemical imbalances?

  Depression, OCD, and schizophrenia
• What do twin studies analyze to support genetic behavior evidence?

  Concordance rates of twins
• What is the difference between monozygotic (MZ) and dizygotic (DZ) twins?

  MZ twins share the same genes, DZ do not
• Define genotype.

  The genetic makeup of an individual
• Define phenotype.

  The expressed traits of an individual
• What does Charles Darwin's theory of natural selection suggest?

  Genetically determined behaviors enhance survival
• Why is evolution considered a biological explanation for behavior?

  It involves genetic traits passed through generations
• What is phenylketonuria (PKU)?

  A rare genetic disorder detected in babies
• How can PKU affect learning if left untreated?

  It causes severe learning difficulties
• How can early detection of PKU prevent learning difficulties?

  By placing the child on a restricted diet
• How does PKU illustrate the relationship between genotype and phenotype?

  Genotype leads to phenotype affected by diet
• What advancements have been made due to understanding neurochemical processes?

  Development of psychoactive drugs for treatment
• What did Cipriani et al (2018) find about antidepressant drugs?

  Wide variations in their effectiveness
• What does the biological approach suggest about human behavior?

  It is governed by internal, genetic causes
• How do biological psychologists view the influence of the environment on phenotype?

  They acknowledge it influences gene expression
• Why should the biological approach be used alongside other theories?

  To fully understand human behavior complexities