WEST-E Special Education Practice Test

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What is Down Syndrome characterized by?

  1. A triplet anomaly in the 21st set of chromosomes

  2. A disorder affecting only physical development

  3. A single chromosome deletion

  4. An anomaly affecting multiple chromosome pairs

The correct answer is: A triplet anomaly in the 21st set of chromosomes

Down syndrome is characterized by the presence of an extra chromosome 21, resulting in a total of three copies of this chromosome instead of the usual two. This genetic condition is specifically due to a triplet anomaly, also referred to as trisomy 21. Individuals with Down syndrome typically exhibit a range of physical and developmental characteristics, which can include distinct facial features, developmental delays, and various health issues, but the hallmark of the syndrome is indeed the chromosomal anomaly involving the 21st pair. The correct understanding of this condition is essential for recognizing the unique needs and potential of individuals with Down syndrome in educational and support settings. It emphasizes the biological basis of the syndrome rather than focusing solely on physical characteristics or other chromosomal anomalies.

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