Inferring ancestral origin using a single multiplex assay of ancestry-informative marker SNPs

Tests that infer the ancestral origin of a DNA sample have considerable potential in the development of forensic tools that can help to guide crime investigation. We have developed a single-tube 34-plex SNP assay for the assignment of ancestral origin by choosing ancestry-informative markers (AIMs) exhibiting highly contrasting allele frequency distributions between the three major population-groups. To predict ancestral origin from the profiles obtained, a classification algorithm was developed based on maximum likelihood. Sampling of two populations each from African, European and East Asian groups provided training sets for the algorithm and this was tested using the CEPH Human Genome Diversity Panel. We detected negligible theoretical and practical error for assignments to one of the three groups analyzed with consistently high classification probabilities, even when using reduced subsets of SNPs. This study shows that by choosing SNPs exhibiting marked allele frequency differences between population-groups a practical forensic test for assigning the most likely ancestry can be achieved from a single multiplexed assay.     

Guantánamo Bay: Towards Legality?

This article outlines the US Supreme Court's approach to the habeas corpus entitlements of suspected terrorists detained in Guantánamo Bay and argues for the extension of constitutional habeas corpus rights to them. The article considers two ways in which the Supreme Court might carry out this task: first, 'the territorial approach' (based on domestic legal principles of 'unincorporated territories' and principles of leasehold), and secondly, 'the extraterritorial approach' (based on international purposive approaches to the reach of human rights treaties exemplified by the European Court of Human Rights' Article 1 jurisprudence). For reasons of effectiveness of protection, the Article expresses a clear preference for the latter. The House of Lords decision in R (Al-Skeini) v Secretary of State for Defence (2007) is proposed as a template for such a development. Finally the article refutes arguments rejecting such a development based on the 'trade-off thesis' and perceptions of judicial competence.     

Allele frequency distribution for 21 autosomal STR loci in Bhutan

We studied the allele frequency distribution of 21 autosomal STR loci contained in the AmpFlSTR^® Identifiler™ (Applied Biosystems), the Powerplex^®16 (Promega) and the FFFL (Promega) multiplex PCR kits among 936 individuals from the Royal Kingdom of Bhutan. As such these are the first published autosomal DNA results from this country.     

Brazilian National Identity at a Crossroads: The Myth of Racial Democracy and the Development of Black Identity

This article aims at coping with the 2003 implementation of affirmative action policies favoring blacks and “browns” in public-funded universities in Brazil. We are especially interested in coming to terms with some of the most resounding controversies over this type of “race”-based policy, which in our view are to be seen as reactions to some core aspects of Brazil’s national identity. The key question that has pervaded this debate is: Should the State apparatus, by means of these non-universalist policies, foster racial identities in a society that has historically imagined itself as racially mixed and, as such, able to deal with race-based conflicts in a quite positive way? As we will strive to demonstrate, these controversies gained momentum as multiculturalism started to inform identity-oriented social movements, which in recent years excelled in challenging the image of Brazil as a successful case of a melting-pot society by denouncing deep-seated social inequalities grounded in racial lines. We want to investigate whether popular resistance to race-based public policies will propel the rise of a sort of resented form of nationalism in Brazil’s public scene.