MSFinals-1595

A 16-year-old girl comes to her GP with a complaint of never having had a menstrual period. During the examination, the GP observes normal external female genitalia and a vagina that terminates as a blind pouch. The absence of a uterus or ovaries is palpable, and there is no growth of pubic or axillary hair. What karyotype abnormality is likely to be present in this patient?