A doctor finds that the mammary glands of a woman are not functioning due to a genetic abnormality that influences the structural design of the thoracic cavity.This is likely the result of a mutation:

Question

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A mutation in a Hox gene can impact the development of body structures, including the thoracic cavity, which could affect the functioning of the mammary glands. Mutations in sex chromosomes or antibodies are less likely to have a direct impact on this specific issue, and HSV-1 is a virus that is unrelated to this genetic abnormality.

A Doctor Finds That the Mammary Glands of a Woman