370 EUGENICS 



Investigators have found a pair of identical twins that had been 

 separated at infancy and had been brought up in different envi- 



Journal of Heredity 



These identical twins were separated in their infancy. They were tested, after seventeen 

 years of separation, and found to be very similar in physical and mental characteristics. 



ronments in different families in, approximately, the same social 

 conditions. When they became adults, they were given intelligence 

 tests and both were found to have practically the same intelligence 

 quotients. They were successfully occupying professional posi- 

 tions requiring about the same intelligence. The different envi- 

 ronments had produced little change in the inherited mental 

 abilities. 



QUESTIONS AND SUGGESTIONS 



1. What is eugenics ? Give the history of the science of eugenics. 



2. What are three difficulties in investigating human heredity ? 



3. Discuss how histories were obtained from families of superior 

 intelligence ; from families of inferior intelligence. 



4. What is the relation of crime to heredity ? 



5. State two general methods of race improvement. 



6. Name seven euthenical measures that may be enforced ; discuss 

 their importance. 



7. Discuss the topic "Environment versus Heredity." 



