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The karyotype of genetic disorder which exhibits Gynaecomastia is: 

The karyotype of genetic disorder which exhibits Gynaecomastia is:  Correct Answer 44+XXY

Concept:

  • A normal Human has 23 pairs of chromosomes (46 chromosomes) out of which 22 pairs are autosomes or allosomes  (Non - sex chromosomes), while the 23rd pair is the sex chromosome which is responsible for the hereditary changes.
  • One - One chromosome each in the sex chromosome pair comes from the maternal and paternal side respectively.
  • Any deviation from this normal arrangement may result in a disorder or syndrome.
  • These disorders may arise either by addition, deletion, or nonfunctioning of a single or multiple chromosomes.
  • Examples of such disorders are Turner syndrome, Edward's syndrome, Patau's syndrome, Klinefelter's syndrome, etc.

Explanation:

  • The presence of more than one copy of the X chromosome in males causes Klinefelter's syndrome. Individuals having this syndrome have 44 + XXY chromosomes, and they exhibit a condition called Gynaecomastia
  • Gynaecomastia: It is commonly known as Man boobs. It is a condition in which the breasts of boys and men increase in size and swell up.
  • This condition arises due to the hormonal imbalance caused by one additional set of the X chromosome. Testosterone (male hormone) gets reduced and Estrogen (female hormone) gets increased.

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​Additional Information

  • Jacob's Syndrome: Individuals suffering from this syndrome are called super males. They have an extra Y chromosome in their karyotype 44 + XYY
  • Superfemales have one or two extra X chromosome in their karyotype 44 + XXX or 44 + XXXX

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