Multiple choice general knowledge science & technology

In human 45 numbers of chromosomes (22AA + XO) is resulted

  1. Turner’s syndrome

  2. Down syndrome

  3. Klinefelteis syndrome

  4. Edwards’ syndrome
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A Correct answer
Explanation

Turner syndrome is characterized by 45 chromosomes with a karyotype of 45,X (22 pairs of autosomes + one X chromosome). The notation XO indicates only one sex chromosome (X) is present instead of the usual two (XX or XY). This occurs due to nondisjunction during gamete formation.

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