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Inbreeding coefficients of various populations in Europe and Asia. Offspring of biologically related persons are subject to the possible effects of inbreeding, such as congenital birth defects. The chances of such disorders are increased when the biological parents are more closely related.
The Habsburg Philip II of Spain and his wife, the Tudor Mary I of England.Mary and Philip were first cousins once removed. The wedding of Nicholas II of Russia and Alix of Hesse (whose name was changed to Alexandra Feodorovna in the process), second cousins through their shared great-grandparents Louis II, Grand Duke of Hesse, and Wilhelmine of Baden
Royal descent plays an important role in many African societies; authority and property tend to be lineally derived. Among tribes which recognize a single ruler, the hereditary blood line of the rulers (who early European travelers described as kings, queens, princes, etc., using the terminology of European monarchy) is akin to a dynasty. [15]
In most states, sexual activity between a lineal ancestor and a lineal descendant (parent, grandparent with child or grandchild), siblings (brother-sister) and aunt-nephew, uncle-niece is penalized as incest. However, individual statutes vary widely. Rhode Island has repealed its criminal incest statute, [56] and only criminalizes incestuous ...
The family intermarried multiple times, securing power and influence across a European empire for 200 years - but it came with an unusual side-effect. ‘Habsburg Jaw’ seen in European kings ...
In European history, "post-classical" is synonymous with the medieval time or Middle Ages, the period of history from around the 5th century to the 15th century. It began with the collapse of the Western Roman Empire and merged into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions ...
The ascent of republicanism to the political mainstream started only at the beginning of the 20th century, facilitated by the toppling of various European monarchies after the end of World War I; as at the beginning of the 21st century, most of the states in Europe are republics with either a directly or indirectly elected head of state.
Consanguine marriage is marriage between individuals who are closely related. Though it may involve incest, it implies more than the sexual nature of incest.In a clinical sense, marriage between two family members who have coefficient of relationship r = 3.125% (i.e. second cousin, first cousin twice removed, half-first cousin once removed, great-great-great-grandmother / great-great-great ...