218 Biology in Amei'ica 



While there are some objections to the chromosome theory, 

 and while it as yet has only the status of a theory, it never- 

 theless serves better than any other to explain the observed 

 results of IMendelian inheritance. To what extent the cyto- 

 plasm shares with the chromatin the role of determination, 

 and whether all the characters of livin<>: things, or only the 

 more superficial are determined by the latter, cannot at pres- 

 ent be said. 



In this tinj'' workshop of the cell wonderful things are 

 taking place. Here is recorded the liistory of the past, and 

 here is meted out the fate of generations yet unborn. 



