296 GENETICS 



123 4567 8 



/ aaaa bbbb cccc dddd eeee ffff gggg hhhh 

 aaaa bbbb cccc dddd eeee ffff gggg hhhh 



// aaaa cccc eeee gggg 



bbbb dddd ffff hhhh 



/// aaab efff 



cddd gggh 



IV aadd 



gffh 

 Figure 62. See text for explanation. 



In figures 62 and 63, the genes of each of the 8 Individuals 

 of generation I are Indicated respectively by different letters 

 (a to h), there being represented but four pairs of genes 

 in each case. The constitution of the individual In genera- 

 tion IV indicates the source of his four pairs of genes; thus 

 In figure 62, the individual of IV carries genes from indi- 

 viduals I, 4, 6, 7 and 8 of generation I ; In figure 63 he carries 

 a different combination. A large number of different combi- 

 nations are possible In different individuals of generation IV, 

 even when but four pairs of genes are taken into considera- 

 tion. 



123 4567 8 



/ aaaa bbbb cccc dddd eeee ffff gggg hhhh 

 aaaa bbbb cccc dddd eeee ffff gggg hhhh 



// 

 /// 

 IV 



