Sisters that are identical Josh and Jeremy Salyers, identical twin brothers, married Brittany and Briana Deane. And now, one of the couples has just welcomed their first kid, while the other is expecting their first child. A quaternary marriage is defined as a pair of identical twins marrying identical twins. It may sound odd (or perhaps taboo) to some people. They do happen, albeit infrequently. In reality, there are approximately 250 such weddings on record. These couples may even have identical twins of their own, which is unsurprising. In any case, any offspring would officially be considered first cousins from a genealogical (not to mention legal) standpoint, but their DNA would be difficult to identify from that of complete genetic siblings. Furthermore, based just on DNA, determining who the biological parents are would be nearly impossible (of course, that explanation is too neat). Other elements may also play a role in establishing official identity). Identical twins have the same 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 merely two sets in this situation.
