332 



AB x al» Ab x aB 



1AB 



Fig. 3. 



gametes. Reduplication or proliferation resulting in n — 1 gametes 

 may then take place in either of the opposite pairs of quadrants 

 according to the parental composition. 



2. If in the gametes of any plant some factors are distri- 

 buted according to one of the reduplicated series and other 

 factors according to the normal Mendelian System, as we know 

 they may be ; the segregations by which such a System is brought 

 about cannot have happened simultaneously. Moreover if various 

 reduplications can take place very early in some individuals and 

 not in otkers, we cannot imagine how the normal form of the 

 plant remains unchanged, unless these reduplications affect tissues 

 originally set apart as germinal. 



As possibly significant we note here the fact that in the 

 iimbryonic development of plants the order of the various divi- 

 seons is known to be subject to great Variation and it is not 

 nconceivable that such disturbances of the order in which the 



