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A 19-year-old male from rural West Virginia presents to his family medicine doctor to discuss why he is having trouble getting his wife pregnant. On exam, he is 6 feet 2 inches with a frail frame and broad hips for a male his size. He is noted to have mild gynecomastia, no facial hair, and small, underdeveloped testes. He claims that although he has a lower libido than most of his friends, he does have unprotected sex with his wife. His past medical history is notable for developmental delay and difficulties in school. What is the most likely chromosomal abnormality in this patient?
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A 30-year-old man presents for an infertility work-up. He and his wife have been unsuccessfully trying to get pregnant for 12 months. The patient has no known history of medical conditions. Physical exam was notable for features depicted in Figure A. Laboratory testing showed increased levels of FSH and LH. Which of the following is the most likely explanation for this patient's presentation?
47 XYY chromosome disorder
47 XXY chromosome disorder
Chloride ion transporter defect
Defective migration of GnRH cells
A young Caucasian couple in their late twenties present for an infertility evaluation after trying to conceive over 2 years. On physical exam, the female appears healthy and states that she has regular menstrual cycles. The male partner is noted to have long extremities with wide hips, low muscle mass, gynecomastia, sparse facial or chest hair, and small, firm testes. Laboratory tests of the male partner reveal elevated serum LH and FSH and low testosterone levels. If cytogenetic tests were performed, which of the following would be seen in this male?
Presence of a barr body
Absence of a barr body
Absence of a second sex chromosome
Trisomy of chromosome 13
Trisomy of chromosome 18
A 25-year-old male visits his physician because of fertility issues with his wife. Physical exam reveals bilateral gynecomastia, elongated limbs, and shrunken testicles. Levels of plasma gonadotropins are elevated. Which of the following is also likely to be increased in this patient: