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 | |
[i] 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.