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  2. Coefficient of relationship - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_relationship

    first cousin thrice removed: 1.5625% (2 −6) 7: second cousin twice removed: 0.78125% (2 −7) 8: third cousin once removed: 0.390625% (2 −8) 9: fourth cousin: 0.1953125% (2 −9) 2: half-sister / half-brother: 25% (2 −2) 3: half-aunt / half-uncle / half-niece / half-nephew: 12.5% (2 −3) 4: half-first cousin: 6.25% (2 −4) 2: double ...

  3. Cousin marriage law in the United States - Wikipedia

    en.wikipedia.org/wiki/Cousin_marriage_law_in_the...

    Several states of the United States prohibit cousin marriage. [1] [2] As of February 2014, 24 U.S. states prohibit marriages between first cousins, 19 U.S. states allow marriages between first cousins, and seven U.S. states allow only some marriages between first cousins. [3] Five states prohibit first-cousin-once-removed marriages. [4]

  4. Cousin - Wikipedia

    en.wikipedia.org/wiki/Cousin

    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.

  5. Family Ties: Celebrities You Didn't Know Were Related - AOL

    www.aol.com/celebrities-were-sure-didnt-know...

    Nancy Hanks is third cousin four times removed to Tom Hanks. ... His first-cousin once-removed is actress and comedian Amy Schumer, who also speaks out about gun violence and often appears with ...

  6. What’s a Second Cousin vs. Second Cousin Once Removed? - AOL

    www.aol.com/lifestyle/second-cousin-vs-second...

    First, second, and third cousins (and so on unto infinity cousins) are an equal number of generations removed from the common ancestor. First cousins are both the second generation removed from ...

  7. Cousin marriage - Wikipedia

    en.wikipedia.org/wiki/Cousin_marriage

    In Pakistan, where there has been cousin marriage for generations and the current rate may exceed 50%, one study estimated infant mortality at 12.7 percent for married double first cousins, 7.9 percent for first cousins, 9.2 percent for first cousins once removed/double second cousins, 6.9 percent for second cousins, and 5.1 percent among ...

  8. Consanguinity - Wikipedia

    en.wikipedia.org/wiki/Consanguinity

    Thus, a parent and child pair has a value of r=0.5 (sharing 50% of DNA), siblings have a value of r=0.5, a parent's sibling has r=0.25 (25% of DNA), and first cousins have r=0.125 (12.5% of DNA). These are often expressed in terms of a percentage of shared DNA but can be also popularly referred to as % of genes although that terminology is ...

  9. Prohibited degree of kinship - Wikipedia

    en.wikipedia.org/wiki/Prohibited_degree_of_kinship

    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.