noun, noun which may take the genitive case particle 'no'
atavism; throwback; reappearance of an ancestral trait
Biological term for a trait reappearing after skipping one or more generations. Also used figuratively for any trait or behavior that seems to come from an ancestor.
彼の赤毛は隔世遺伝だそうだ。
His red hair is said to be a case of atavism.
隔世遺伝で祖父にそっくりな顔立ちになった。
Through atavism, he ended up with features just like his grandfather's.