[Adam Murphy (OP)]

Sam sent in this question:

If identical twin brothers marry identical twin sisters, and each of those couples has a child, will those two children be like twins?

What do you all think?

[Bored chemist]

No, but they will be very nearly as similar as if they were siblings, rather than cousins.

[Halc]

They'd be as alike as half-siblings if they'd married random people, but yes, just like any other siblings given the conditions in the OP

[EvaH]

Asked and answered this week on our show - and you can listen to the answer here...

https://www.thenakedscientists.com/podcasts/question-week/how-alike-are-kids-identical-twins