314 



PLANT HYBRIDIZATION BEFORE MENDEL 



All of the flowers on each of three plants were pollinated for 

 the purpose of this experiment. 



We have seen that, on the basis of the theory already stated, 

 the offspring of an F^ hybrid, when one character-pair is involved, 

 should be : AB, Ab, aB, and ab, in equal numbers. 



In the crossing experiment just undertaken, there would then 

 be the following combinations : 



Series 



1. Egg cells AB, Ab, aB, ab, X pollen cells AB 



2. Egg cells AB, Ab, aB, ab, X pollen cells ab 



3. Egg cells AB, X pollen cells AB, Ab, aB, ab 



4. Egg cells ab, X pollen cells AB, Ab, aB, ab 



There would then result combinations as follows : 



The appearance of the seeds and their actual composition would 

 be then as follows : 



SERIES I 



constant 



hybrid 



hybrid 



hybrid 



