PART II 



HEREDITY IN ITS RELATION TO MONOGONIC 

 REPRODUCTION 



Introductory Remarks 



In the following part those phenomena of heredity will be 

 considered which do not result directly from the composition of 

 the germ-plasm as already described, but which would also 

 occur if there were no such thing as sexual reproduction. In 

 considering the phenomena of the regeneration of lost parts, of 

 multiplication by fission and genunation^ of the production of 

 unicellular germs, and of the continuity of the germ-plasm, it will 

 materially facilitate the attainment of clear results if the inves- 

 tigation is conducted throughout as though these phenomena 

 occurred in organisms in which the process of multiplication is, 

 and always has been, entirely an asexual one. The complica- 

 tions resulting from sexual reproduction can be considered after- 

 wards, and it will then be easy to connect them with all these 

 phenomena of heredity. 

 92 



