Things such as mannerisms, gestures, speech patterns,
habits and jokes have been observed as common between many sets of twins. Another example
that supports the greater influence of heredity are examples of siblings raised in different homes.
In a 1979 statement by "WillermanaE it is explained how researchers studied children who had
been adopted and raised apart(away from their natural mothers). The IQ scores of the natural
mothers and children were compared. While the scores of the children and their adoptive parents
were not simular, those of the children's natural mother's were. In addition, another study
conducted among twins revealed that personali