Table 3. Results of regression of between-group on within-group variance as a test for genetic drift.

Group	Extant model	Consistent with drift?	Slope	R2	P value
All hominins	Chimpanzee	Yes	0.59	0.54	0.11
	Gorilla	Maybe	0.31	0.14	0.07
	Human	Yes	0.51	0.31	0.18
Genus Homo	Chimpanzee	Yes	1.00	0.46	1.00
	Gorilla	Yes	0.14	0.01	0.25
	Human	Yes	0.99	0.54	0.98
All australopiths	Chimpanzee	No	0.30	0.22	0.02
	Gorilla	Maybe	0.30	0.12	0.09
	Human	Maybe	0.28	0.10	0.07
Robust australopiths	Chimpanzee	No	0.07	0.01	0.04
	Gorilla	Maybe	0.14	0.02	0.08
	Human	Yes	0.14	0.01	0.23