Table 7. Mean and variance of number of shared segments on a chromosome of 1.632 M for different relationships obtained by simulation (300,000 replicates)^a.

R	FS-based	Mean	Variance	HS-based	Mean	Variance	Lineal	Mean	Variance
1/4	UN	2.539	1.170	HS	2.135	0.942	GPO	1.316	0.537
1/8	GUGN	1.678	1.482	HUN	1.475	1.187	GGPO	1.066	0.767
	C	1.885	1.311
1/16	C1R	1.147	1.213	HC	0.941	1.020	G3PO	0.736	0.721
1/32	2C	0.674	0.845	HC1R	0.572	0.714	G4PO	0.471	0.543
1/64	2C1R	0.387	0.519	H2C	0.336	0.445	G5PO	0.287	0.358
1/128	3C	0.219	0.299	H2C1R	0.193	0.258	G6PO	0.169	0.217

FS, full-sib; HS, half-sib; UN, uncle–nephew; GPO, grandparent–offspring; GUGN, great-uncle–great-nephew; HUN, half-uncle–nephew; GGPO, great-grandparent–great-grandoffspring; C, cousin; C1R, cousin once removed; HC, half-cousin; G, great; G3PO, great-great-grandparent–great-great-grandoffspring; 2C, second cousin; HC1R, half-cousin once removed; G4PO, great-great-great-grandparent–great-great-great-grandoffspring; 2C1R, second cousin once removed; H2C, half second cousin; G5PO, great-great-great-great-grandparent–great-great-great-great-grandoffspring; 3C, third cousin; H2C1R, half second cousin once removed; G6PO, great-great-great-great-great-grandparent–great-great-great-great-grandoffspring.

^aThe mean number of shared segments from simulation agreed very closely with those expected from the formula. Of these 19 items, only three differences exceeded 0.001 and none exceeded 0.003.