Inheritance in Gametophytes 



125 



superficial result but the process. The process may be 

 recalled for a moment. Suppose that each of the 8 

 chromosomes in a spore mother-cell contains a single 

 determiner; in such a case a nucleus can be represented 



(REDUCTION | 

 / DIVISION 



SPOROPHYTE 

 INDIVIDUAL 

 CHROMOSOMES 



GAMETOPHYTfc 



INDIVIDUAL 

 4 CHROMOSOMES 



I FERTILIZATION! 



FIG. 28. Diagram representing life-history of a higher plant as 

 regards chromosome number. 



by fig. 29. When the reduction division occurs it 

 means that 4 of these chromosomes will go to each of 

 the two resulting nuclei. When this happens, are the 

 chromosomes chosen indiscriminately? It has been 

 learned that there is a certain limitation in the choice, 



