問題詳情

38. Some human males have three sex chromosomes (XXY) and suffer from a genetic disease known as Klinefelter’ssyndrome. The symptoms include a failure to develop sexually and an impairment of intelligence. This is an example of adisease of ________.
(A) point mutation
(B) karyotype
(C) homeostasis
(D) bacterial origin
(E) old age

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