If 2 sets of twins had kids, would those kids also be siblings?

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If you had two separate sets of twins, say one set is male and the other female, and they coupled up and eventually had kids, would their kids be siblings or cousins on a DNA level?

This is just wildly hypothetical, but I saw a clickbait ad somewhere about a story, and now I’m curious if there’s any validity to it. It said the kids would all have matching DNA and were siblings

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29 Answers

Anonymous 0 Comments

Depends if we’re talking genetically or legally. I’ll assume you’re talking genetically…

A) Two set of twins yield children who are genetically full siblings

B) One set of twins and two unrelated mates yield children who are genetically half siblings

C) One set of siblings and an unrelated set of siblings yields children who are genetically half siblings. The children are known as double cousins since they share both sets of grandparents.

Anonymous 0 Comments

Depends if we’re talking genetically or legally. I’ll assume you’re talking genetically…

A) Two set of twins yield children who are genetically full siblings

B) One set of twins and two unrelated mates yield children who are genetically half siblings

C) One set of siblings and an unrelated set of siblings yields children who are genetically half siblings. The children are known as double cousins since they share both sets of grandparents.

Anonymous 0 Comments

Depends if we’re talking genetically or legally. I’ll assume you’re talking genetically…

A) Two set of twins yield children who are genetically full siblings

B) One set of twins and two unrelated mates yield children who are genetically half siblings

C) One set of siblings and an unrelated set of siblings yields children who are genetically half siblings. The children are known as double cousins since they share both sets of grandparents.

Anonymous 0 Comments

I happen to have grown up with the twins your clickbait arcticle is about. The Deane twins, Brittany and Brianna, met another pair of identical twins at a twin convention, paired off, and wound up as matching identical couples. They now have kids. Those kids, genetically, are indistinguishable from full siblings, even though physically and legally, they are cousins

Anonymous 0 Comments

I happen to have grown up with the twins your clickbait arcticle is about. The Deane twins, Brittany and Brianna, met another pair of identical twins at a twin convention, paired off, and wound up as matching identical couples. They now have kids. Those kids, genetically, are indistinguishable from full siblings, even though physically and legally, they are cousins

Anonymous 0 Comments

This happened; I read about it a few months ago. Identical twin brothers married identical twin sisters. Both had a baby boy. The kids are cousins but genetically they’re brothers because of their parents’ genetics.

The two families live together as well. I think it was Pennsylvania somewhere.

Anonymous 0 Comments

This happened; I read about it a few months ago. Identical twin brothers married identical twin sisters. Both had a baby boy. The kids are cousins but genetically they’re brothers because of their parents’ genetics.

The two families live together as well. I think it was Pennsylvania somewhere.

Anonymous 0 Comments

This happened; I read about it a few months ago. Identical twin brothers married identical twin sisters. Both had a baby boy. The kids are cousins but genetically they’re brothers because of their parents’ genetics.

The two families live together as well. I think it was Pennsylvania somewhere.

Anonymous 0 Comments

Genetically, yes. They would on average share the same amount of genes as they would with a full sibling.

But that’s sort of like saying that your identical twin is technically yourself because you have the same DNA.

Anonymous 0 Comments

Genetically, yes. They would on average share the same amount of genes as they would with a full sibling.

But that’s sort of like saying that your identical twin is technically yourself because you have the same DNA.