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NEETZoologyPrinciples of Inheritance and Variation

A clinical report describes an individual who is a sterile female with short stature, rudimentary ovaries, and a lack of other secondary sexual characters. Which of the following represents the chromosomal complement of this individual?

Options

  1. A47 , XXY
  2. B45 with XO
  3. C47 , XX, +21
  4. D44 with XO

Correct answer

B. 45 with XO

Step-by-step solution

The clinical symptoms described (sterile female, short stature, rudimentary ovaries, and lack of secondary sexual characters) are characteristic of Turner's syndrome. Turner's syndrome is a sex chromosomal aneuploidy caused by the absence of one of the X chromosomes. This results in a total of 45 chromosomes with an XO karyotype ( 44 autosomes + 1 X chromosome). Option 1 represents Klinefelter's syndrome, Option 3 represents a female with Down's syndrome, and Option 4 contains a miscalculation of the total chromoso

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