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NEETZoologyPrinciples of Inheritance and Variation

Which of the following genetic disorders is an example of aneuploidy resulting from the loss of a chromosome?

Options

  1. ADown's syndrome
  2. BTurner's syndrome
  3. CKlinefelter's syndrome
  4. DSickle cell anemia

Correct answer

B. Turner's syndrome

Step-by-step solution

Aneuploidy is a chromosomal disorder caused by the gain or loss of one or more chromosomes. Turner's syndrome is caused by the absence (loss) of one of the X chromosomes, resulting in a karyotype of 45 with X0. Therefore, it is an example of aneuploidy due to chromosome loss (monosomy). Down's syndrome and Klinefelter's syndrome are examples of aneuploidy resulting from the gain of a chromosome (trisomy). Sickle cell anemia is a Mendelian disorder caused by a point mutation (substitution), not a chromosomal aneuplo

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