LUTHER BUKBANK 



as "homochronous," but the big word scarcely 

 adds anything to the observed facts. 



The same may be said of the words "homotic" 

 and "heterotopic" heredity, sometimes employed 

 to express the fact that an inherited anomaly 

 say a tumor may appear in the same tissues of 

 the body of parent and offspring (homotic), or in 

 another case in different tissues (heterotopic). 



The fact is, as regards this particular matter, 

 that a tendency to the development of a tumor 

 may be inherited, but that the precise location of 

 the tumor may perhaps be determined by the ex- 

 traneous circumstances say a local irritation. 



The inheritance of special abnormalities of a 

 precise and definite character say a lock of white 

 hair located on a particular part of the head, as 

 a typical example is likely to arouse surprise 

 and to call forth comment on the mysteries of in- 

 heritance; yet rightly considered such a phenom- 

 enon is no more remarkable than the inheritance 

 of all the ordinary characteristics that lead to 

 what is familiarly spoken of as a family resem- 

 blance. 



No one is surprised that the eyes or hair or 

 complexion or stature or shape of nose or habits 

 of mind in any individual strikingly resemble the 

 same qualities of the individual's father. 



In other words, the broad general facts of 

 heredity are accepted as matters of fact without 

 seeming to call for special comment. Stated 

 otherwise, this is no more than saying that no one 

 is surprised that grapes grow on grape vines and 



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