The Mendelian Inheritance of Certain Chemical Characters in Maize. 2 1 



Considering first the starchy Fo kernels which do not contain ss 

 we should expect to find in a random sample of such kernels regard- 

 less of colors the following relations as to protein content : 

 I PP = 10.62 



1 pp = 12.25 



2 Pp =-= 21.36 



44-23 



Whence = 11.06 = expected percentage of protein 



in F2 starchy kernels. 



But 11-475 = observed mean percentage of 



protein in all F.j starchy kernels 

 (yellow abs. -^ 11.66 white obs. 

 = 11.29). 



This gives a difference of .415 between observation and theory, 

 a relatively small departure. 



For the sweets we have the following results in respect to pro- 

 tein content. 



I PP (modified) - 1 1-435 



1 pp „ = 12.25 



2 Pp ,, = 24.50 



48-185 



whence — '- = 12.05 = expected percentage of protein 



in Fo sweet kernels 

 and 12.46 = observed mean percentage of 



protein in all Fo sweet kernels 

 (yellow obs. = 12.47 white obs. 

 = 12.45). 

 This gives a difference between observation and theory of 0.41, 

 a very close agreement. We reach here the same conclusion as with 

 respect to crude fat» namely that the hypothesis appears to be justi- 

 fied, and that protein (or nitrogen) content appears to behave 

 in inheritance as an independent unit character. 



Proceeding in the same way with ash content we may take A 

 to denote low ash content (the dominant character) and a to denote 

 high ash content. Then 



AA 1.59 

 aa = 2.09 

 Aa = 1.44 



