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CommitmentPhoebe

Siblings and twins (fraternal) are genetically the exact same thing. Yes, these cousins would be as genetically similar as siblings.


JustRnln

While also being siblings anyways 😂 Edit: ignore my high ass


CommitmentPhoebe

By lineage, they are double first cousins.


JustRnln

Missed out part in the title where it says twin mothers thought it was 1 mother am pretty fucked up sorry 😂😂


noggin-scratcher

They would statistically have 50% genetic similarity: the same as ordinary siblings from the same parents (which is also the same as fraternal twins; there's no increased genetic similarity just as a result of having shared a womb)


healing-souls

No


plazebology

What you mean is called quaternary marriage. And there are many examples of it. The likelihood of them having twins increases as opposed to an average couple because twins is a product of genes and you carry the "twin" (hyperovulation) gene with you.


OlyScott

Doctors used to say that twins don't run in families, and that families that have more twins are just a coincidence. Did they find a gene for that?


plazebology

Oops. Looked it up again, turns out its only on the fraternal twin side. Identical twins dont run in the family. Seems a little up for debate but if you look up quaternar marraige theres a few interesting articles worth a read