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 Qmechanism mutant  

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5>A 15-year-old boy is evaluated by a clinician for failure to develop norma
l male secondary sexual characteristics. Physical examination reveals small
testes, a small penis, and gynecomastia. The boy has had some difficulties
in school, and the parents say that the school psychometrist said he had
an IQ of 90. This patient's condition is most likely to be related to
which of the following?
A. Deletion
B. Nondisjunction of an autosomal chromosome
C. Nondisjunction of a sex chromosome
D. Non-Robertsonian translocation
E. Robertsonian translocation



Klinefelter Sdr

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