Table 5.

Two estimates of the European-American Genetic Contribution to African-Americans (Admixture Estimates), Expressed as the Percent Contribution of European-American Haplotypes, for African-American Y-STR Haplotypes and mtDNA SSO-types

Group	Y-STR		mtDNA
	1	2	1	2
California	N/A	N/A	18.0 ± 3.3	21.0
Florida	24.6 ± 5.9	31.2	N/A	N/A
Indiana	36.1 ± 7.6	37.8	N/A	N/A
Illinois	N/A	N/A	8.0 ± 4.2	13.2
Louisiana	41.8 ± 8.5	44.8	3.9 ± 4.1	20.0
Maryland	26.2 ± 4.9	31.5	21.8 ± 5.6	21.1
Missouri	31.1 ± 5.8	33.9	5.2 ± 2.9	11.9
New York	25.4 ± 3.8	33.3	N/A	N/A
Oregon	33.8 ± 6.5	42.6	4.0 ± 3.5	10.5
Pennsylvania	30.2 ± 6.4	34.9	3.8 ± 3.8	15.1
Texas	25.8 ± 5.1	33.3	9.0 ± 3.9	11.8
Virginia	11.8 ± 5.9	19.6	12.4 ± 3.8	24.4
Washington	N/A	N/A	6.0 ± 4.0	4.1
All	27.5 ± 2.5	33.6	9.0 ± 2.0	15.4

Methods: (1) coalescent approach (Bertorelle and Excoffier 1998); (2) assignment test (Paetkau et al. 1995). The standard errors for the estimates for the coalescent approach are based on 1000 bootstrap replications.