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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.
The degree of kinship between two people may give rise to several legal issues. Some laws prohibit sexual relations between closely related people, referred to as incestuous.
Admit it: You don't know what it means either. Find out with our handy cousin chart! The post What’s a Second Cousin vs. Second Cousin Once Removed? appeared first on Reader's Digest.
The coefficient of relationship is a measure of the degree of consanguinity (or biological relationship) between two individuals. The term coefficient of relationship was defined by Sewall Wright in 1922, and was derived from his definition of the coefficient of inbreeding of 1921.
Five states prohibit first-cousin-once-removed marriages. [4] Some states prohibiting cousin marriage recognize cousin marriages performed in other states, but despite occasional claims that this holds true in general, [ 5 ] laws also exist that explicitly void all foreign cousin marriages or marriages conducted by state residents out of state.
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 ...
In the first case, the children are half-siblings as well as first cousins; in the second, the children are half-siblings as well as an avuncular pair. They are genetically closer than half-siblings but less genetically close than full-siblings, [ 10 ] a degree of genetic relationship that is rare in humans and little-studied. [ 11 ]
first cousins (which is counted as fourth degree of kinship in Roman civil law tradition) In Imperial China (221 BCE to 1912), marriage between first cousins was partially allowed. Marrying the child of one’s paternal aunt, maternal uncle, or maternal aunt was generally accepted in Chinese history during most of China’s dynastic era.