5H 
The Ohio Naturalist. 
[Vol. XV, No. 7, 
Cancel similar constitutions and there are 9 combinations as 
follows: 
a 2 b 2 
anbo 
n 2 b 2 
a 2 bo 
a 2 o 2 
n 2 bo 
anb 2 
ano 2 
n 2 o 2 
If x = 3 and 2x = 6; 
Chromosomes a ♦ 
♦ n 
b t 
t o 
C T 
▼ P 
The following types of gametes 
are possible, 
either male or 
female: 
a a a 
n a 
n n 
n 
b b o 
b o 
b o 
o 
c p c 
c p 
P c 
P 
Possible combinations 
= 64 
Cancel similar ones and there are left 27 types of chromosome 
constitutions. 
a 2 b 2 c 2 
ano 2 c 2 
a 2 b 2 cp 
ano 2 cp 
a 2 boc 2 
n 2 b 2 c 2 
anb 2 c 2 
n 2 b 2 cp 
a 2 bocp 
n 2 boc 2 
anb 2 cp 
n 2 bocp 
anboc 2 
a 2 o 2 p 2 
anbocp 
ano 2 p 2 
a 2 b 2 p 2 
n 2 b 2 p 2 
a 2 bop 2 
n 2 bop 2 
anb 2 p 2 
n 2 o 2 c 2 
anbop 2 
n 2 o 2 cp 
a 2 o 2 c 2 
n 2 o 2 p 2 
a 2 o 2 cp 
If x = 4 and 2x = 8; 
Chromosomes a ♦ 
— 
♦ n 
b t 
T o 
C T 
— 
T P 
d • 
— 
• q 
The following gametes 
are 
possible. 
a 
a 
a 
ana 
a 
a n 
n 
n 
a 
n 
n 
n 
n 
b 
b 
b 
o b b 
o 
o b 
b 
o 
o 
b 
o 
o 
o 
c 
c 
P 
c c p 
P 
c p 
c 
c 
P 
P 
c 
P 
P 
d 
q 
d 
d d q 
d 
q d 
q 
d 
q 
q 
q 
d 
q 
In this case 256 types of matings are possible giving rise to SI 
varieties of hereditary constitutions. 
