Estrogen has been linked to aggressive behavior in both males and females

Which statement is LEAST likely to be made by a theorist who subscribes to the Five-Factor Model?

a) Each personality trait is allocated a different region in the brain. b) Personality characteristics are the product of internal mechanisms. c) Personality differences have a genetic basis. d) Personality traits are stable over time.

Mental retardation caused by a fragile-X chromosome appears:

in males only. in females only. in both sexes equally. more frequently in males than in females.