Heredity, date of fertilization, membership of Bokanovsky Group–details were transferred from test-tube to bottle.
Hasn’t it occurred to you that an Epsilon embryo must have an Epsilon environment as well as an Epsilon heredity?
Besides, we start with a different heredity.
Imagine a factory staffed by Alphas–that is to say by separate and unrelated individuals of good heredity and conditioned so as to be capable (within limits) of making a free choice and assuming responsibilities.
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.