We all have different personalities; no two persons, even identical twins, behave the same. The question is then, what factors determine how a child's character will turn out to be? Is it genetics/ nature, or is it the environment /nurture or it is both? Science is not sure. But I believe 70% of a person's character is determined by genetics, and the rest by the environment.
Scientists think how a child interacts with his or her environment is the major factor that determines how their personality will turn out to be, and since no two people can have the same interactions with their environment, no two people, even identical twins, can have identical personalities, even though compared to non-identical twins, they still share many similarities. That explains why two people, even those who share identical genes, never behave the same.
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