THE GERM-PLASM TIIEORV 



30^ 



it was pointed out by Guycr (100^2), Sutloii fl!)03), 

 and others that the distribution of the achill cliar- 

 acteristics of hybrids which were found by Mendel 

 to reappear in the offspring in rather (k'finilc propor- 



||. |i. \l' \\ ]\' J8- 



Fig. 82. — Diagrams to show the pairs of ( hroiiiDsoiurs and their Ik»- 

 havior at the time of maturation of the (•««. Three pairs of eliromo- 

 somes are represented ; three from one parent, three from the other. 

 The six possible modes of separation of these three are shown in 

 the lowest line. (From Morgan, WI4) 



tions, could be explained if these cliaraeteristies are 

 located in the chromosomes. During- synapsis, as 

 already explained (p. 44), homologous maternal and 

 paternal chromosomes are sui)posed to pair and then 

 separate in the reduction division. Tt seems ])robable 

 that the pairs of chromosomes do not occnpy any 



