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(C) The Barr body is a condensed, inactive $X$ chromosome found in the cells of individuals with more than one $X$ chromosome. In humans, females typi

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Normal female

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(C) The Barr body is a condensed, inactive $X$ chromosome found in the cells of individuals with more than one $X$ chromosome. In humans, females typically have two $X$ chromosomes $(XX)$, one of which is inactivated to form a Barr body. Normal males have only one $X$ chromosome $(XY)$ and therefore do not possess a Barr body. Thus, the presence of a Barr body in the $WBC$ (white blood cell) indicates that the individual is a normal female.

$A$ medical technician, while observing a human blood smear under the microscope, notes the presence of a Barr body close to the nuclear membrane in the $WBC$. This indicates that the person under investigation is:

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