If one set of identical twins (males) married another set of identical twins (females), is it possible for them to have identical children?

rebeccatoymp say: Nothing is impossible! There have been a good handful of cases like this. Of course, no person on the planet is the same (including identical twins) so there is a chance that the children wont look like a pair of identical twins would, but it is very likely that they would look similar (: look up "identical twins marry identical twins kids" and you should get some pictures and articles.
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? say: No. Though they were at some point identical genetically, both have undergone mutations and they are no longer identical. The exact same combination of genes in all 4 twins, no longer exists.

Consider evolution, it is well established that there is "Genetic Drift" in a population due to the "Mutation Rate" for the various alleles. Evolution works only because offspring carry mutations that make them genetically different from their parents.

The same process works on the twins. There is a steady change in the alleles in their genome through time and each twin has different mutations, because the mutations occur at random.

Put another way for those who disagree: When, exactly, do you think mutations occur? No matter when they occur, the individual with the mutation is different from their parents and their siblings. And it does not matter if their sibling is their twin. They have the mutation and their twin does not.
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Dr. D say: Possible, Yes.
Probable, No.

Why not? The process of meiosis in the develop of the sperm and egg cells means that each germ cell will carry different haploid genes.
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swbarnes2 say: Sigh. When the SAME TWO PEOPLE have multiple children, they don't look identical, do they?
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User say: Yes.

Edit: morons voting me down
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