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Globally, the most common form of consanguineous union is between first cousins, in which the spouses share 1 ⁄ 8 of their genes inherited from a common ancestor, and so their progeny are homozygous (or more correctly autozygous) at 1 ⁄ 16 of all loci (r = 0.0625). [27]
Data on cousin marriage in the United States are sparse. It was estimated in 1960 that 0.2% of all marriages between Roman Catholics were between first or second cousins, but no more recent nationwide studies have been performed. [175] It is unknown what proportion of that number were first cousins, which is the group facing marriage bans.
A cousin is a relative that is the child of a parent's sibling; this is more specifically referred to as a first cousin.. More generally, in the kinship system used in the English-speaking world, a cousin is a type of relationship in which relatives are two or more generations away from their most recent common ancestor.
Marriages between first cousins are legal in 19 states. For premium support please call: 800-290-4726 more ways to reach us
A cousin marriage is a marriage where the spouses are cousins (i.e. people with common grandparents or people who share other fairly recent ancestors). The practice was common in earlier times and continues to be common in some societies today, though in some jurisdictions such marriages are prohibited. [1]
Exception: first cousins may marry if both are 65 years of age or older, and can prove to a superior court judge in the state that one of the cousins is unable to reproduce. [14] Marriage, intercourse (cited in state law as fornication), or adultery [13] A class 4 felony, [13] with an imprisonment term ranging between 1 and 3 and three-quarter ...
It follows that for first cousin progeny, F = 0.0625, that is, 1/16 loci predictably are homozygous, whereas for second cousins, F = 0.0156, that is, 1/64 of loci are homozygous. [ 25 ] A 1990 study conducted in South India found that the incidence of malformations was slightly higher in uncle-niece progeny (9.34%) compared to the first cousin ...
[1] Cook v. Cook: January 13, 2005: Court of Appeals of Arizona, Division 1, Department A: Found that a cousin marriage performed elsewhere should be recognized because Arizona law at the time expressly directed such recognition, and although it was amended after the marriage, retroactive application of the law was not called for.