Table 2.

MK Neutrality Tests

	Mus famulus			Mus caroli
	Synonymousa	Nonsynonymousb	P Value	Synonymous	Nonsynonymous	P Value
Mus musculus musculus
Polymorphic changes	4	18	0.0095	4	18	0.0059
Fixed differences	15	12		21	16
Mus musculus domesticus
Polymorphic changes	14	26	0.5529	14	26	0.3065
Fixed differences	8	9		13	13

NOTE.—Tests were performed with either M. famulus or M. caroli as outgroups.

^a Synonymous (silent) mutations.

^b Nonsynonymous (replacement) mutations.