Mental Illness runs in families. There is always a possibility to inherit behavioural symptoms or endphenotypes. That is to say, that there are measurable components in science that look at neurophysiological, biochemical, neuroanatomical, cognitive or neuropsychological structure in the brain. This genetic code analysis can refer to anything from the size and shape of brain cells, to changes in brain structure, or to impairments in working memory. The term endophenotype