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A pregnant human female was advised to undergo MTP. It was diagnosed that the fetus she was carrying had developed from a zygote having 45 chromosomes with only one X chromosome. - Biology

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Question

A pregnant human female was advised to undergo MTP. It was diagnosed that the fetus she was carrying had developed from a zygote having 45 chromosomes with only one X chromosome.

  1. What is this condition called and how does it arise?
  2. Why was she advised to undergo MTP?
Short Note

Solution

  1. The embryo has Turner’s Syndrome due to aneuploidy of the sex chromosome. Such a disorder is caused due to the absence of one of the X chromosomes, i.e., 45 with XO.
  2. She was advised MTP as the child will have the following problems:
    1. rudimentary ovaries
    2. poorly developed breasts
    3. lack of other secondary sexual characteristics
    4. delayed or no onset of the menstrual cycle, and infertile.
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