Abstract
From genetic studies on the pedigree of a family of Japnese Chess experts (Syogi Iemoto) and of Bernouli, a mathematician, I came to following conclusions.
(1) The talent in Go and Syogi (Japanese Chess) requires inborne ability similar to that required for mathematics.
(2) In both of these, hereditary abilities in memory, reasoning and synthetic thinking powers are necessary.
(3) The talent in these fields seems to be transmitted from parents to children as a dominant trait in contrast to the non-talent which is recessive.
(4) The phenotypic expression of the trait is influenced by other factors.
(5) Some inhibitors associated with sex-determing factors seems to be concerned with the trait, giving rise to sex-limited type of inheritanse of the trait.
(6) The inhibitor gene in double dose suppresses to a large expression of the gene for the developement of the talent; in a single dose its suppressive action is much less and consequently the talent developes markedly.
(7) The inhibitors seem to vary in their action.
