My sons seem to have exactly the same teeth. Only one has a little more space, so that it is slightly different. Could that be an argument to believe they are identical twins?

When my sons were born, it was not known whether they were identical or fraternal twins. This had to do with the membranes. (There’s a special name for that, which I’ve forgotten.) Now we recently went to the orthodontist and it turns out that they have exactly the same set of teeth. Only one has a little more space in the jaw, which means it has moved slightly differently. But they get exactly the same treatment. They look alike. Only one is stronger and larger than the other. And they are completely different in character. If they do indeed appear to have the same set of teeth, is that an argument to assume that they are identical twins after all?

Asker: Ellie, 43 years old

Answer

Best,

As far as I know, identical twins look like two drops of water. You say they look alike, but are they really identical? What about hair color, eye color, blood type? Only if all these are identical can they be identical twins.
An almost identical set of teeth is indeed an indication that they may be identical twins, but it is not proof in itself. Don’t forget that regular brothers also have a good chance of having identical teeth.

regards

Answered by

Dr. ir. Tim Vleugels

Plant breeding, Molecular Genetics, clover, progeny, quinoa, seed production

My sons seem to have exactly the same teeth.  Only one has a little more space, so that it is slightly different.  Could that be an argument to believe they are identical twins?

Institute for Agricultural and Fisheries Research
Burg. van Gansberghelaan 96 box 1 9820 Merelbeke
http://www.ilvo.vlaanderen.be

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