Lisa occasionally worries that her family's dull habits will rub off on her, such as in "Lisa the Simpson" (season nine, 1998) she worries that the "Simpson gene" will make her a dimwit later finding out the gene only goes through the male side.
莉萨偶尔担心她家庭的习惯影像到她的智力，比如在"Lisa the Simpson"(第9季 1998)中她担心辛普森基因会让她越来越笨，但后来她发现这个基因只作用于男性。