試題詳解

55. About human disorders due to chromosomal alterations, which of the following statements is INCORRECT?
(A) Down’s syndrome is an aneuploid condition that results from three copies of chromosome 21.
(B) Turner syndrome is the only known viable monosomy X in female human.
(C) Klinefelter syndrome is the result of an extra chromosome in a male producing XXY individuals.
(D) Certain cancers, including chronic myelogenous leukemia are caused by chromosome translocation.
(E) cri du chat (“cry of the cat”) syndrome results from a specific duplication of chromosome 5.