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Here’s a fun fact:
From a scientific point of view, the children of identical twins are the genetic equivalent of half-siblings rather than cousins. So, if identical twins marry another set of identical twins, then the resulting children would be the genetic equivalent of full siblings!
I would predict that their children would all look like siblings from the same family.
It's a strong possibility that they would have some family resemblence. If both their kids took after Mom, for isnstance, that YEAH... but one could take after dad and the other more mom...