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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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Kfields37 Kfields37
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6 years ago
A 13-year-old girl has a karyotype that reveals an absent homologous X chromosome with only a single X chromosome present. What medical diagnosis will the nurse observe on the chart?
 
  a. Down syndrome
  b. Cri du chat syndrome
  c. Turner syndrome
  d. Fragile X syndrome
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#1
6 years ago
ANS: C
A condition with the presence of a single X chromosome and no homologous X or Y chromo-some, so the individual has a total of 45 chromosomes, is known as Turner syndrome. Down syndrome is a change in one arm of a chromosome. Cri du chat syndrome is due to a chromosome deletion. Fragile X syndrome is due to a break or a gap in a chromosome.
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