Multiple choice

Which of the following genetic disorders are associated with the absence of an entire sex chromosome in the sufferer?

  1. 45, X

  2. Mixed gonadal dysgenesis

  3. XX male syndrome

  4. 47, XYY

  5. 47, XXY
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A Correct answer
Explanation

Turner syndrome 45,X, encompasses several conditions in human females, of which monosomy X (absence of an entire sex chromosome, the Barr body) is most common. It is a chromosomal abnormality in which all or part of one of the sex chromosomes is absent or has other abnormalities.

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