132 Plant Genetics 



the angiosperms is to produce sporophytes. The 

 characters which they carry appear to be wholly sporo- 

 phytic, the factors which they carry functioning only 

 after fertilization." This is a logical inference from most 

 of the data on genetics. It does not mean, however, 

 that we should leave all gametophytes out of considera- 

 tion, for active investigation of their behavior in inher- 

 itance should reveal facts of considerable theoretical 

 value. 



1. Barber, M. A., Univ. of Kansas Sci. Bull. no. 4. 1907 (p. 3). 



2. East, E. M., and Park, J. B., Studies on self-sterility. I. 

 The behavior of self-sterile plants. Genetics 2 : 505-609. 1917. 



3. Kite, G. S., The physical properties of the protoplasm of cer- 

 tain animal and plant cells. Am. Jour. Physiol. 22:146-173. 

 1913- 



