EVOLUTIONAL ZOOLOGY 23 1 



law of Mendel have been determined in human inheritance. 

 Since certain abnormal and pathological conditions have been 

 shown both in man and in lower organisms to be of such a 

 nature, a thorough understanding, not only of the hereditary 

 transmission of disease, but of the inheritance of immunity 

 against disease has at least been made possible. 



Whether or not man's social organization is such as to 

 forever debar him from the benefits which he might derive 

 from an application of these principles of heredity to himself, 

 is a question which the science of genetics is unable to answer, 

 but there can be no doubt that, should he ever deem it wise to 

 utilize the means at his command, he will be found equally 

 amenable to hereditary control. 



