156 Explanation of Particulate Inheritance 
we repeat, different to such a degree that the activation 
of one prevents that of the other, the two formative 
actions will be likewise different for all the points of the 
soma upon which their action would be perferably or 
exclusively directed, and they would be able thus either to 
combine and thus unite into a single resultant formative 
action, or, by developing their respective characters 
separately, to bring about an intimate interlacing of 
them, in such a way as to cause the appearance of a com- 
mingled intermediate character, or finally the paternal 
character developed by one of the formative actions can 
at a given point prevail over the maternal to such an ex- 
tent as to appear in all its purity, while perhaps the reverse 
appears in a neighboring point of the soma, and the 
maternal character comes alone to development. 
A characteristic example of this interlacement of pa- 
ternal and maternal characters remaining in part distinct 
but in part fused, is shown us by the hybrid arising from 
the spontaneous crossing of Vitis aestivalis and Vitis 
labrusca, the epidermis of whose leaves is formed like a 
mosaic, the cells of which belong either to the purely 
paternal type or to the purely maternal type, or to an 
intermediate form.'6 
If now after considering the phenomena of particulate 
inheritance due to sexual reproduction, we consider the 
phenomena of this particulate inheritance in its broadest 
extent and most general significance in order to be able to 
answer the question; how can the simple fact be explained 
that two individuals can be altogether alike except for a 
single definite peculiarity at a single given point of the 
*2¢Strasburger: Uber periodische Reduktion der Chromosomen- 
zahl im Entwicklungsgang der Organismen. Biol. Centralbl., Bd., 
XIV. No. 23 and 24, Dec. 1. and 15, 1804. P. 850. 
