I never understood her preoccupation with heredity.
Once, when Aunty assured us that Miss Stephanie Crawford’s tendency to mind other people’s business was hereditary, Atticus said, "Sister, when you stop to think about it, our generation’s practically the first in the Finch family not to marry its cousins.
There are no more uses of "hereditary" in the book.
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It is hereditary, but fortunately not contagious.
It is an unfortunate hereditary condition that is not easily detected even by the regular and thorough cardiac screening.