May, 1915.] 
The Chromosome Mechanism. 
5i5 
If x = 5 and 2x = 10; 
Chromosomes a ♦ ♦ n 
b t — t o 
c ▼ ▼ P 
d • • q 
e ■ — ■ r 
The following gametes are possible: 
aaaaanaaanaa 
bbbbobbboobo 
cccpcccppcpc 
ddqdddqqdddq 
ereeeereeere 
aanannannnan 
oobobobbooob 
pppcpcpccppp 
qdqqdqqqddqq 
ererrerrrerr 
n 
a 
n 
n 
b 
0 
b 
b 
P 
c 
c 
c 
d 
d 
q 
d 
e 
r 
e 
r 
n 
n 
n 
n 
0 
0 
0 
0 
c 
P 
P 
P 
q 
d 
q 
q 
r 
r 
e 
r 
From these 1024 combinations are possible, representing 243 
constitutions. 
If x = 6 and 2x = 12; 
04 kinds of male or female gametes possible, 
4,096 chance combinations, 
representing 729 hereditary constitutions. 
If x = 7 and 2x = 14; 
128 kinds of gametes possible, 
16,384 combinations, 
representing 2187 constitutions. 
If x = 8 and 2x = 16; 
250 kinds of gametes, 
05,530 combinations, 
representing 6501 constitutions. 
If x = 9 and 2x = 18; 
512 kinds of gametes possible, 
202,144 combinations, 
representing 19,583 constitutions. 
If x = 10 and 2x = 20; 
1,024 kinds of gametes possible, 
1,048,576 combinations, 
representing 58,749 constitutions. 
