AS THE BIOLOGIST SEES IT 



particular traits, physical and mental 

 and Galton was almost the first to include 

 mental traits in heredity on the same 

 basis as physical traits interesting, I 

 say, but not very specific as to just what 

 particular traits one is going to get in the 

 respective J^, J4, Y& etc., from the 

 respective parents, grandparents, great 

 grand-parents, et al. And that is really 

 what we burn to know. 



I remember a red-headed boy among 

 my early companions whose parents were 

 brown-haired, and this boy used to won- 

 der why he was red-headed. By constant 

 reminders we never let him cease wonder- 

 ing. Finally his parents discovered that 

 back in the ancestral line there had 

 existed another shock of flame. And 

 parents and red-haired son were satisfied 

 to say that he was a "throw-back" to 

 great grandfather William; red hair was a 

 part of the one-eighth of his inheritance 

 that the boy got from his great grand- 

 parents. 



Mendelism makes no such broad gen- 

 71 



