... uniform throughout both twins of a given pair, who share 100% of their genes, that seems to be a good place to start the testing. Irving Gottsamn in 1966 at the Psychology Inventory in California conducted a huge test involving 79 pairs of identical twins and 68 fraternal all of which were separated at birth and who grew up independent of one another (Slanzanis ... 103). Personality testing was done on all of them and the results are as follows. In the category of physical restraint and dominance 42% of fraternal twins shared the same or near ... middle ages adult twins who were reared...

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