Miko is a 16-year-old girl who lives in Japan with her family. She is most likely to seek her parents' advice on which of the following?

Recent research has determined that a variation in the dopamine D2 receptor gene has been linked to _______; as a result, we can conclude that a person with this variation _______.

a) major depression; will be diagnosed with the disorder b) generalized anxiety disorder; may or may not be diagnosed with the disorder c) ADHD; may or may not be diagnosed with the disorder d) schizophrenia; will be diagnosed with the disorder

Fred and George are identical twins. Ashton and Michael are fraternal twins. Which of the following statements is true?

A) Ashton and Michael have the same genetic makeup. B) Fred and George have the same genetic makeup. C) Ashton and Michael are more genetically similar than Fred and George. D) Fred and George are genetically no more alike than ordinary siblings.