Males who are sexually under developled with rudimentary testes and prostate glands, sparse pubic and facial hair, long arms and legs and large hands & feet are likely to have the chromosome complement of :
Correct Answer: 46, XXY
Description: Answer is C (46, XXY) : The patient in question depicts a hypogonadic male that occurs when there are two or more X chromosomes, (47XX Y) and one Y chromosome, and represents the clinical picture of klinefelter's syndrome. None of the options appear technically correct as an extra X chromosome in the male should increase the total number of chromosomes to 47 and hence 47 XXY should be the most appropriate answer. Within the available options however an extra X-chromosome is the most essential aspect and hence the best answer here is 46 XXY. Klinefelter's Syndrome: 47 XXV or 46 X,Y / 47 XXY Mosaicism Small firm testes: Hyalinization of seminiferous tubules and azoospermia Gynaecomastia Lack of secondary male characters such as deep voice, beard, male distribution of pubic hair Distinct body habitus: Elongated body: Abnormally long leg The mean IQ is some what lower than normal but mental retardation is uncommon Hypogonadism and in feility Klinefelter's syndrome is produced by non disjunction during meiotic divisions
Category:
Pediatrics
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