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Children of identical twins are genetically siblings, not cousins.


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#1 SouthernComfort

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Posted 17 September 2019 - 10:06 AM

Cousins whose parents are identical twins share 25 percent of their DNA, instead of the usual 12.5 percent. While full-siblings share 50 percent of their DNA, half-siblings share 25 percent. That’s why, though children of identical twins are legally cousins, they are genetically the equivalent of half-siblings.



#2 noodle

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Posted 27 September 2019 - 01:47 AM

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