A quaternary marriage is defined as a pair of identical twins marrying identical twins. It may sound crazy (or even taboo) to some people. They do happen, albeit infrequently. There are approximately 250 such marriages on record (The most famous of which, are Teyolla and Keyolla Loux and their husbands, Shawn and Eric Crow). These couples may even have identical twins of their own, which is unsurprising.
In either case, any offspring would technically be considered first cousins from a genealogical standpoint, but their DNA would be difficult to distinguish from that of full genetic siblings.
Furthermore, based solely on DNA, determining who the biological parents are would be nearly impossible (of course, that explanation is too neat). Formal identification may be possible due to other factors).
How is it possible? Consider the following for a moment...
Identical twins have identical genetic material, including eggs and sperm (while fraternal twins are conceived from a different egg and sperm). As a result, the four “sets” of DNA are the same as only two sets in this case.
So the question is can a set of twins marry another set of twins? Let's hear your views and share with others to comment.
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