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Turner's syndrome in human females is caused by:
AAbsence of one X chromosome (45, X)
BTrisomy of the X chromosome (47, XXX)
CTrisomy of chromosome 18
DTranslocation of chromosome 21
Answer & Solution
Correct answer: A. Absence of one X chromosome (45, X)
Turner's syndrome results from the loss of one X, giving a 45, X karyotype. Such females are sterile with rudimentary ovaries and lack secondary sexual characters.
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