LOTSY, CURRENT THEORIES OF EVOLUTION. 403 





ARE TB CER abend 
= 9a Obes Ic 9 
The primary zygote A X | 
B receives: ‚9a + 9% 
| 
After longitudinal split- | 
ting of these (indirect chro- | 
mosome-binding) we find 
in the zygote A X B DE ROT 
The gametes, formed by | 
the plant developped from | 
the zygote A X B will con- | 
sequently obtain: 9a + 9b (nova species: D) 18 
The primary zygote D x 
C then receives 9a + 9b+ Ic 
After longitudinal split- 
ting we find in the zygote 
DSG 2x Ja +2)< 9b+ 2 X 9c 
After reduction in D X C | 
the gametes obtain: 9a +9b + Ic (nova species E) 27 
Fig. 2. Indirect chromosome binding after Winge. 
