Molecular markers and human history: A tale of two haplogroup systems

To chronicle demographic movement across African Asian corridors, a variety of molecular (sequence analysis, restriction mapping and denaturing high performance liquid chromatography etc.) and statistical (correspondence analysis, AMOVA, calculation of diversity indices and phylogenetic inference, etc.) techniques were employed to assess the phylogeographic patterns of mtDNA control region and Y chromosomal variation among 14 sub-Saharan, North African and Middle Eastern populations. The patterns of genetic diversity revealed evidence of multiple migrations across several African Asian passageways as well within the African continent itself. The two-part analysis uncovered several interesting results which include the following: (1) a north (Egypt and Middle East Asia) to south (sub-Saharan Africa) partitioning of both mtDNA and Y chromosomal haplogroup diversity, (2) a genetic diversity gradient in sub-Saharan Africa from east to west, (3) evidence in favor of the Levantine Corridor over the Horn of Africa as the major genetic conduit since the Last Glacial Maximum, (4) a substantially higher mtDNA versus Y chromosomal sub-Saharan component in the Middle East collections, (5) a higher representation of East versus West African mtDNA haplotypes in the Arabian Peninsula populations versus no such bias in the Levant groups and lastly, (6) genetic remnants of the Bantu demographic expansion in sub-Saharan Africa. ^

Treason and trial : consuetudines and law in the romances of Chrétien de Troyes and the lais of Marie de France

Treason, in the romances of Chrdtien de Troyes and the lais of Marie de France, is explored more often as afin' amor problem than as a legal issue with its concomitant sociopolitical ramifications. It is precisely the historical function of literature within the ambit of court culture that appears to have shaped the legal context of the poems of Chrdtien de Troyes and the lais of Marie de France. Counterpoising the literary treatment of treason in Le Chevalier au Lion and Lanval with actions and definitions of treachery by contemporary, twelfth-century chronicle and customary law sources reveals that the conceptualized, fictional world of Chrdtien's Yvain closely reflects the workings of the Capetian society Chretien experienced. Marie's Lanval reflects as well the historical impressions of the Angevin court with which she had familiarity, a court whose concept of treason leaned more toward the maiestas concept found in Roman jurisprudence tradition.