Children inherit their parents’ physical attributes, but scientists know less about whether they also inherit the personalities of their mother and father. Some personality traits appear to have a genetic basis, but several genes, not just one, contribute to personality. Environment also plays a part in the development of personality traits. Although your child might have a genetic tendency toward certain personality traits, he might develop them only if conditions in his environment work in conjunction with the genes to produce them.
Genes and Personality
Heredity Versus Environment