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5. Can Identical Twins be Both Cousins and Siblings? – Yes!
courtesy of: sprinklesandcupcake.wordpress.com
If male identical twins marry and have children with females that are also identical twins, their kids will be both cousins and full siblings. This may sound confusing, but the fact is that children born from their pairings will be legal cousins and genetic full siblings. Two children are considered genetic siblings if the new chromosomes that each child receives come from the same genetic pool.