“Genetics of Intellectual and Personality Traits Associated With Creative Genius: Could Geniuses Be Cosmobian Dragon Kings?”, 2014 (; backlinks; similar):
[Behavioral genetics discussion of eminence/genius: intelligence, developmental processes, psychopathology, and creativity scales all contribute to accomplishment but leave much unexplained, in particular, the odd pattern of inheritance where genius runs in families but highly sporadically and not following any standard Mendelian or polygenic inheritance pattern.
The authors refer to the concept of ‘emergenesis’, where emergenic traits are not additive combinations of subtraits (as is strongly the case for traits like intelligence) but rather are multiplicative combinations, which are epistatic at the genetic level. Because all subtraits must be present to have a chance of producing the overall trait, emergenic traits can be highly genetically influenced yet still rare and sporadically appearing within families. (The Wiley Handbook of Genius 2014, chapter 14)]