What causes the emergency of gifted individuals is a topic of immense interest for obvious reasons. Genetics play a factor, and it’s much more likely than not that a gifted individual knows one or two blood relatives at two or three degree of separation, closer is possible, just unlikely. Not as unlikely as having a gift in the first place, but gifted individuals that have a uncle with a gift outnumber gifted individuals that have a gifted parent by a reliable margin. The obvious exception is pregnancy of multiple babies, when one of the children is gifted the other one(s) are very likely to be. Mixes of gifted and not gifted twins are rare, and similar situations in triplets rarer still, since triplets themselves...
Fernando was losing interest in the article. It didn’t site a single number or statistic, it didn’t even mention that among the global population one in every hundred had a gift. Or that attempts at eugenics with gifted didn't produce any noticeable results. Though the later might have been because the "Super-Interesting" Magazine left here was not an actual scientific journal and was just science-flavored entertainment. Still, he expected more for something in the lobby of a institution that was conducting researching multiples with gifts.
Not that he has any intention to complain, given that they also made the mistake of getting a bunch of preteens and teens with magical powers in the same room. Their hands are full enough.