Table 1.

The 15 IBD partitions among the four gametes of two individuals

State		Element of (AB)	Conditional kinship, ϕ
1		{Ap, Am, Bp, Bm}	1
2		{Ap, Am}, {Bp, Bm}	0
3		{Ap, Am, Bp}, {Bm}	1/2
4		{Ap, Am, Bm}, {Bp}	1/2
5		{Ap, Am}, {Bp}, {Bm}	0
6		{Ap, Bp, Bm}, {Am}	1/2
7		{Ap}, {Am, Bp, Bm}	1/2
8		{Ap}, {Am}, {Bp, Bm}	0
9		{Ap, Bp}, {Am, Bm}	1/2
10		{Ap, Bm}, {Am, Bp}	1/2
11		{Ap, Bp}, {Am}, {Bm}	1/4
12		{Ap, Bm}, {Am}, {Bp}	1/4
13		{Ap}, {Am, Bp}, {Bm}	1/4
14		{Ap}, {Am, Bm}, {Bp}	1/4
15		{Ap}, {Am}, {Bp}, {Bm}	0