MENDELISM 21 



Other results occurred as follows — 



Smooth x Wrinkled 



i 

 S 



I 



i i 



s w 



53 J o 1765 (1765 x 3 = 5295). 



Smooth yellow x Wrinkled white. 



SY 



SY WrY SWh WrWh 



The Fj SY x WrWh (see Law 4) 



S^ WrY SW WrW 



2869 2933 2798 2803 



What is the inference from all these results? It seems 

 abundantly evident that plants and animals are built up 

 of a number of indivisible unit factors upon which their 

 characters depend, and that these units are capable of 

 acting independently of one another ; e.g. in the maize 

 seeds just referred to, the yellow, the white, the smooth 

 and the wrinkled characters depend each upon a separate 

 and quite independent factor. This is one of the most 

 important conclusions to which we are led by Mendel's 

 experiments. 



"The fact," says Prof. Bateson, "that two cells are 

 concerned in the production of all ordinary forms of life was 

 discovered long ago, and has been part of the common 

 stock of elementary knowledge of all educated persons for 

 about half a century. The full consequences of this double 

 nature seem to have struck nobody before Mendel. Simple 

 though the fact is, to many it is difficult to assimilate as a 

 working idea. We are accustomed to think of a man, a 



